According to the study, the most Republican-leaning group in America is white Mormons, 76 percent of whom favor the GOP and 16 percent of whom favor Democrats -- a 60-point margin.
(Note: These numbers include self-described independents who lean toward either party. These are also broken down only into groups that represent a significant chunk of Americans.)
The next most Republican group is also white and religious -- white evangelical millennials (adults under 34), who split 70/19 for the GOP. Mormon and evangelical sub-groups account for the rest of the top eight, too, until you get to men from the Silent Generation (between ages 69 and 86), who split 60/31 Republican, and a three-way tie to round out the top 10 between white married men, white male parents and whites from the South Central region (Alabama, Arkansas, Kentucky, Louisiana, Mississippi, Oklahoma, Tennessee and Texas).
Here are the top 10 most Republican demographics ("NH" stands for non-Hispanic, "Xer" is Generation X, etc.). There are actually 12 since there is a three-way tie at the bottom:
| Demographic | Republican/lean Republican | Democratic/lean Democratic |
| White NH Mormon | 76 | 16 |
| White NH Evangelical Protestant Millennial | 70 | 19 |
| White NH Evangelical Protestant Xer | 70 | 20 |
| Mormon | 70 | 22 |
| White Non-Hisp Evangelical Protestant | 68 | 22 |
| White NH Evangelical Protestant | 68 | 22 |
| White NH Evangelical Protestant Boomer | 68 | 23 |
| White NH Evangelical Protestant Silent | 67 | 25 |
| White NH Silent men | 60 | 31 |
| White NH Married men | 58 | 32 |
| White NH Parent men | 57 | 31 |
| White NH South Central (AL AR KY LA MS OK TN TX) | 58 | 32 |
Since white Americans dominate this list, here are the top 10 demographics that don't isolate them:
| Demographic | Republican/lean Republican | Democratic/lean Democratic |
| Mormon | 70 | 22 |
| Silent men | 54 | 37 |
| Married men | 51 | 38 |
| Rural | 47 | 39 |
| Married | 48 | 41 |
| Older Silent (79-86) | 48 | 43 |
| Silent (69-86) | 47 | 43 |
| Younger Silent (69-78) | 47 | 43 |
| $75,000 to $99,999 | 48 | 44 |
| College men | 47 | 43 |
And while almost all of the most Republican groups are white, almost all of the most Democratic groups are African Americans, who as a whole tilt 80/11 toward Democrats. In fact, each of the top 56 most Democratic groups broken down by Pew are some sub-group of black Americans.
Here are the top 10 most Democratic groups:
| Demographic | Republican/lean Republican | Democratic/lean Democratic |
| Black NH Silent women | 4 | 89 |
| Black NH Post graduate degree | 5 | 87 |
| Black NH No | 6 | 88 |
| Black NH Older Boomer (59-68) | 8 | 89 |
| Black NH Silent (69-86) | 7 | 87 |
| Black NH Gen Xer women | 6 | 84 |
| Black NH Boomer women | 8 | 86 |
| Black NH Some college | 8 | 85 |
| Black NH $50,000 to $74,999 | 8 | 85 |
| Black NH $40,000 to $49,999 | 8 | 85 |
The most Democratic groups that aren't black are white atheists (73/16) and all atheists (72/16), followed by Asian American women (73/17).
Here are the top 10 non-black groups:
| Demographic | Republican/lean Republican | Democratic/lean Democratic |
| White NH Atheist | 16 | 73 |
| Atheist | 16 | 72 |
| Asian NH Women | 17 | 73 |
| Asian NH Millennial (ages 18-33 in 2014) | 17 | 70 |
| Asian NH <$30,000 | 17 | 69 |
| Agnostic | 23 | 69 |
| White NH Agnostic | 24 | 67 |
| Asian NH Some college or less | 23 | 66 |
| Asian, non-Hispanic (English-speaking) | 23 | 65 |
| Hispanic Older Boomer (59-68) | 23 | 65 |
The interesting ones here are Asian Americans, who as a whole favor Democrats 65/23. That's notable because Republicans won the Asian American vote in the 1992 and 1996 presidential elections. These voters have swung very blue in recent years, though, going 67 percent for President Obama in 2008 and 73 percent for him in 2012 -- one of the rare groups that moved more toward the Democrats in the latter election.
One of the other big takeaways here: The most Democratic groups are all much more homogeneous than the most Republican groups. Even when you get beyond whites and blacks, there are 10 groups who are at least 65 percent Democratic-leaning, but only one on the GOP side (Mormons).
And if that's not enough, here are all the cross-tabs you could possibly want.
And here is the full table, ranked according to the Republican-Democratic margin:
| Demographic | Republican/lean Republican | Democratic/lean Democratic |
| Black NH Silent women | 4 | 89 |
| Black NH Post graduate degree | 5 | 87 |
| Black NH No | 6 | 88 |
| Black NH Older Boomer (59-68) | 8 | 89 |
| Black NH Silent (69-86) | 7 | 87 |
| Black NH Gen Xer women | 6 | 84 |
| Black NH Boomer women | 8 | 86 |
| Black NH Some college | 8 | 85 |
| Black NH $50,000 to $74,999 | 8 | 85 |
| Black NH $40,000 to $49,999 | 8 | 85 |
| Black NH Married women | 7 | 84 |
| Black NH Baby-Boomer (50-68) | 9 | 85 |
| Black NH Older Gen Xer (42-49) | 9 | 84 |
| Black NH No | 8 | 83 |
| Black NH Midwest | 7 | 82 |
| Black NH College graduate+ | 8 | 82 |
| Black NH $30,000-$74,999 | 10 | 84 |
| Black NH Silent men | 11 | 85 |
| Black NH Women | 9 | 82 |
| Black NH $75,000 to $99,999 | 10 | 83 |
| Black Protestant | 10 | 82 |
| Black NH Generation X (34-49) | 9 | 81 |
| Black NH Boomer men | 11 | 83 |
| Black NH Unmarried women | 9 | 81 |
| Black NH Northeast | 10 | 82 |
| Black NH Urban | 9 | 81 |
| Black NH Protestant | 10 | 82 |
| Black NH Younger Boomer (50-58) | 11 | 82 |
| Black NH College graduate | 9 | 80 |
| Black NH $75,000+ | 11 | 81 |
| Black NH <$30,000 | 11 | 81 |
| Black NH <$30,000 | 11 | 81 |
| Black NH Unmarried | 10 | 80 |
| Black NH Suburban | 11 | 81 |
| Black, non-Hispanic | 11 | 80 |
| Black NH Some college or less | 11 | 80 |
| Black NH $30,000 to $39,999 | 12 | 81 |
| Black NH $150,000+ | 10 | 78 |
| Black NH $100,000 to $149,999 | 12 | 80 |
| Black NH Married | 12 | 80 |
| Black NH Yes | 10 | 78 |
| Black NH Unmarried men | 11 | 79 |
| Black NH South | 12 | 80 |
| Black NH Younger Gen Xer (34-41) | 10 | 77 |
| Black NH Men | 13 | 78 |
| Black NH Older Millennial (26-33) | 11 | 75 |
| Black NH High school or less | 13 | 77 |
| Black NH Millennial women | 13 | 76 |
| Black NH Gen Xer men | 13 | 76 |
| Black NH West | 12 | 75 |
| Black NH Rural | 16 | 78 |
| Black NH Total Unaffiliated | 14 | 75 |
| Black NH Millennial (ages 18-33 in 2014) | 14 | 74 |
| Black NH Yes | 14 | 74 |
| Black NH Married men | 17 | 76 |
| Black NH Nothing in particular | 15 | 74 |
| White NH Atheist | 16 | 73 |
| Atheist | 16 | 72 |
| Black NH Younger Millennial (18-25) | 17 | 73 |
| Black NH Millennial men | 15 | 71 |
| Asian NH Women | 17 | 73 |
| Asian NH Millennial (ages 18-33 in 2014) | 17 | 70 |
| Asian NH <$30,000 | 17 | 69 |
| Agnostic | 23 | 69 |
| White NH Agnostic | 24 | 67 |
| Asian NH Some college or less | 23 | 66 |
| Asian, non-Hispanic (English-speaking only) | 23 | 65 |
| Hispanic Older Boomer (59-68) | 23 | 65 |
| Asian NH $75,000+ | 25 | 67 |
| Asian NH Generation X (34-49) | 24 | 64 |
| Asian NH College graduate+ | 24 | 64 |
| Total Unaffiliated Silent | 25 | 64 |
| Hispanic Total Unaffiliated | 23 | 62 |
| Hispanic Catholic Xer | 23 | 61 |
| Total Unaffiliated Millennial | 24 | 62 |
| Hispanic Boomer women | 23 | 61 |
| Hispanic Gen Xer women | 21 | 58 |
| Hispanic Urban | 24 | 61 |
| Hispanic Nothing in particular | 22 | 59 |
| Total Unaffiliated | 25 | 61 |
| Hispanic Generation X (34-49) | 23 | 59 |
| Hispanic Younger Gen Xer (34-41) | 23 | 59 |
| Post graduate women | 29 | 64 |
| Total Unaffiliated Boomer | 25 | 60 |
| Hispanic Older Gen Xer (42-49) | 23 | 58 |
| Hispanic Post graduate degree | 26 | 61 |
| Hispanic $30,000-$74,999 | 26 | 61 |
| Hispanic Catholic Boomer | 25 | 59 |
| Total Unaffiliated Xer | 26 | 60 |
| Hispanic Gen Xer men | 25 | 59 |
| Hispanic Foreign born | 22 | 56 |
| Hispanic Catholic | 25 | 58 |
| Hispanic Women | 24 | 57 |
| Hispanic Baby-Boomer (50-68) | 25 | 58 |
| Hispanic Catholic | 25 | 58 |
| White NH Jewish | 30 | 62 |
| Hispanic Some college | 28 | 60 |
| Asian NH Men | 28 | 60 |
| White NH Total Unaffiliated | 28 | 59 |
| Hispanic <$30,000 | 25 | 56 |
| Hispanic | 26 | 56 |
| Jewish | 31 | 61 |
| Nothing in particular | 27 | 57 |
| Hispanic Some college or less | 26 | 56 |
| Hispanic Unmarried | 27 | 57 |
| Asian NH $30,000-$74,999 | 30 | 60 |
| White NH Post graduate women | 33 | 62 |
| Hispanic College graduate+ | 30 | 59 |
| Hispanic High school or less | 25 | 54 |
| Hispanic Boomer men | 26 | 55 |
| Unmarried women | 29 | 57 |
| Hispanic Older Millennial (26-33) | 25 | 53 |
| Hispanic Younger Boomer (50-58) | 26 | 54 |
| Hispanic College graduate | 31 | 59 |
| Hispanic Men | 28 | 55 |
| Hispanic Silent (69-86) | 32 | 59 |
| Never married | 30 | 56 |
| Urban | 31 | 57 |
| Hispanic Married | 28 | 54 |
| Hispanic Millennial women | 27 | 53 |
| Hispanic Native born | 31 | 57 |
| Hispanic Catholic Millennial | 28 | 53 |
| Hispanic Suburban | 29 | 54 |
| Living with a partner | 31 | 55 |
| Hispanic Millennial (ages 18-33 in 2014) | 29 | 53 |
| <$30,000 | 31 | 54 |
| <$30,000 | 31 | 54 |
| Hispanic Millennial men | 30 | 53 |
| Asian NH Baby-Boomer (50-68) | 35 | 58 |
| Post graduate degree | 35 | 57 |
| Unmarried | 32 | 54 |
| Divorced/Separated | 32 | 54 |
| Millennial women | 32 | 54 |
| College grad women | 35 | 57 |
| Middle Atlantic (DE DC MD NJ NY PA) | 33 | 55 |
| White NH Nothing in particular | 32 | 54 |
| Hispanic Younger Millennial (18-25) | 32 | 53 |
| Hispanic $75,000+ | 35 | 56 |
| Gen Xer women | 33 | 53 |
| Northeast | 34 | 53 |
| Pacific (AK CA HI OR WA) | 34 | 53 |
| Parent women | 33 | 51 |
| Older Millennial (26-33) | 33 | 50 |
| Unmarried men | 34 | 51 |
| New England (CT ME MA NH RI VT) | 35 | 52 |
| Women | 36 | 52 |
| Millennial (18-33) | 35 | 51 |
| Younger Millennial (18-25) | 36 | 51 |
| College women | 38 | 53 |
| HS or less women | 34 | 49 |
| Non-parent women | 36 | 51 |
| $30,000 to $39,999 | 37 | 51 |
| Boomer women | 38 | 52 |
| Some coll or less women | 36 | 50 |
| White NH Post graduate degree | 40 | 54 |
| White NH Living with a partner | 36 | 50 |
| Hispanic Rural | 31 | 45 |
| Younger Gen Xer (34-41) | 36 | 49 |
| No | 36 | 49 |
| Some college women | 38 | 51 |
| College graduate+ | 40 | 52 |
| Part-time | 37 | 49 |
| Total Catholic Millennial | 36 | 48 |
| White NH College grad women | 41 | 53 |
| White NH Unmarried women | 37 | 49 |
| Generation X (34-49) | 38 | 49 |
| West | 38 | 49 |
| High school or less | 37 | 47 |
| $40,000 to $49,999 | 40 | 50 |
| Millennial men | 38 | 48 |
| Total Catholic Xer | 39 | 49 |
| White NH New England (CT ME MA NH RI VT) | 39 | 49 |
| Yes | 39 | 48 |
| Widowed | 40 | 49 |
| Yes | 38 | 47 |
| No | 39 | 48 |
| Great Lakes-East North (IN IL MI OH WI) | 39 | 48 |
| Older Gen Xer (42-49) | 40 | 48 |
| Older Boomer (59-68) | 41 | 49 |
| Some college or less | 39 | 47 |
| Full-time | 39 | 47 |
| Post graduate men | 42 | 50 |
| Total Catholic | 40 | 48 |
| White NH Never married | 39 | 47 |
| College graduate | 42 | 49 |
| $30,000-$74,999 | 41 | 48 |
| Midwest | 40 | 47 |
| Total Catholic Boomer | 41 | 48 |
| Baby-Boomer (50-68) | 41 | 47 |
| Silent women | 42 | 48 |
| White NH Unmarried | 40 | 46 |
| White NH Urban | 42 | 48 |
| Younger Boomer (50-58) | 41 | 46 |
| Some college | 42 | 47 |
| White NH Pacific (AK CA HI OR WA) | 42 | 47 |
| HS or less men | 40 | 44 |
| Non-parent men | 42 | 46 |
| South | 42 | 46 |
| South Atlantic (FL GA NC SC VA WV) | 42 | 46 |
| White NH Northeast | 42 | 46 |
| White NH <$30,000 | 41 | 44 |
| White NH <$30,000 | 41 | 44 |
| White NH Millennial women | 42 | 45 |
| White NH Middle Atlantic (DE DC MD NJ NY PA) | 43 | 46 |
| Some coll or less men | 42 | 44 |
| Suburban | 43 | 45 |
| Total Catholic Silent | 44 | 46 |
| White NH Part-time | 44 | 46 |
| White NH Divorced/Separated | 42 | 44 |
| Men | 43 | 44 |
| Gen Xer men | 43 | 44 |
| College grad men | 45 | 46 |
| White NH College graduate+ | 46 | 47 |
| White NH Post graduate men | 46 | 47 |
| White NH College women | 46 | 47 |
| $50,000 to $74,999 | 45 | 45 |
| Married women | 44 | 44 |
| Midwest-West North (IA KS MN MO NE ND SD) | 43 | 43 |
| White NH Boomer women | 45 | 45 |
| Parent men | 43 | 42 |
| South Central (AL AR KY LA MS OK TN TX) | 44 | 43 |
| White NH Women | 45 | 44 |
| White NH Gen Xer women | 45 | 44 |
| $150,000+ | 47 | 45 |
| Boomer men | 45 | 43 |
| Mountain (AZ CO ID NM MT UT NV WY) | 45 | 43 |
| White NH Millennial (ages 18-33 in 2014) | 45 | 43 |
| White NH Older Millennial (26-33) | 44 | 42 |
| White NH Unmarried men | 44 | 42 |
| White NH Non-parent women | 45 | 43 |
| $75,000+ | 48 | 45 |
| $100,000 to $149,999 | 48 | 45 |
| Some college men | 46 | 43 |
| White NH Younger Millennial (18-25) | 46 | 43 |
| White NH HS or less women | 44 | 41 |
| White NH Parent women | 44 | 41 |
| Silent (69-86) | 47 | 43 |
| Younger Silent (69-78) | 47 | 43 |
| $75,000 to $99,999 | 48 | 44 |
| College men | 47 | 43 |
| White NH Catholic Boomer | 47 | 43 |
| White NH $30,000 to $39,999 | 46 | 42 |
| White NH Widowed | 46 | 42 |
| White NH Great Lakes-East North (IN IL MI OH WI) | 46 | 42 |
| White NH West | 46 | 42 |
| Older Silent (79-86) | 48 | 43 |
| White NH No | 45 | 40 |
| White NH Mainline Protestant Boomer | 47 | 41 |
| White NH Older Boomer (59-68) | 48 | 42 |
| White NH Yes | 47 | 41 |
| White NH No | 47 | 41 |
| White NH Some coll or less women | 46 | 40 |
| White NH Midwest | 47 | 41 |
| Married | 48 | 41 |
| Married | 48 | 41 |
| White NH College graduate | 50 | 43 |
| White NH Millennial men | 47 | 40 |
| White NH Silent women | 49 | 42 |
| Rural | 47 | 39 |
| White Non-Hisp Mainline Protestant | 48 | 40 |
| White NH Mainline Protestant Silent | 49 | 41 |
| White NH Catholic Silent | 49 | 41 |
| White NH $40,000 to $49,999 | 49 | 41 |
| White NH Mainline Protestant | 48 | 40 |
| White, non-Hispanic | 49 | 40 |
| White Non-Hispanic Catholic | 50 | 41 |
| White NH Mainline Protestant Xer | 48 | 39 |
| White NH Baby-Boomer (50-68) | 49 | 40 |
| White NH Younger Gen Xer (34-41) | 48 | 39 |
| White NH Full-time | 48 | 39 |
| White NH College grad men | 51 | 42 |
| White NH Midwest-West North (IA KS MN MO NE ND SD) | 48 | 39 |
| White NH Catholic | 50 | 41 |
| White NH Catholic Millennial | 49 | 39 |
| White NH $30,000-$74,999 | 50 | 40 |
| White NH Some college women | 49 | 39 |
| White NH Mainline Protestant Millennial | 48 | 37 |
| White NH Generation X (34-49) | 50 | 39 |
| White NH Older Gen Xer (42-49) | 50 | 39 |
| White NH Younger Boomer (50-58) | 50 | 39 |
| White NH High school or less | 48 | 37 |
| White NH $150,000+ | 52 | 41 |
| White NH Non-parent men | 49 | 38 |
| Married men | 51 | 38 |
| White NH Some college or less | 50 | 37 |
| White NH $75,000+ | 53 | 40 |
| White NH $100,000 to $149,999 | 54 | 41 |
| White NH Yes | 50 | 37 |
| White NH Suburban | 51 | 38 |
| White NH Catholic Xer | 53 | 38 |
| White NH Younger Silent (69-78) | 53 | 38 |
| White NH Some college | 52 | 37 |
| White NH $75,000 to $99,999 | 54 | 39 |
| White NH $50,000 to $74,999 | 53 | 38 |
| White NH Married women | 52 | 37 |
| White NH Silent (69-86) | 53 | 37 |
| White NH College men | 54 | 38 |
| Silent men | 54 | 37 |
| White NH Men | 53 | 36 |
| White NH Older Silent (79-86) | 54 | 37 |
| White NH Mountain (AZ CO ID NM MT UT NV WY) | 53 | 36 |
| White NH Rural | 52 | 35 |
| White NH Boomer men | 54 | 36 |
| White NH HS or less men | 52 | 34 |
| White NH South Atlantic (FL GA NC SC VA WV) | 54 | 35 |
| White NH Gen Xer men | 54 | 34 |
| White NH Married | 55 | 34 |
| White NH Married | 55 | 34 |
| White NH Some coll or less men | 54 | 33 |
| White NH South | 55 | 34 |
| White NH Some college men | 56 | 33 |
| White NH Married men | 58 | 32 |
| White NH Parent men | 57 | 31 |
| White NH South Central (AL AR KY LA MS OK TN TX) | 58 | 32 |
| White NH Silent men | 60 | 31 |
| White NH Evangelical Protestant Silent | 67 | 25 |
| White NH Evangelical Protestant Boomer | 68 | 23 |
| White Non-Hisp Evangelical Protestant | 68 | 22 |
| White NH Evangelical Protestant | 68 | 22 |
| Mormon | 70 | 22 |
| White NH Evangelical Protestant Xer | 70 | 20 |
| White NH Evangelical Protestant Millennial | 70 | 19 |
| White NH Mormon | 76 | 16 |