Hispanic illegal immigrants aren't very partisan, but they clearly favor the Democratic Party, according to data from the Pew Research Center.
The table below, based on Pew's 2012 National Survey of Latinos, shows 31 percent of Hispanic illegal immigrants identified as Democrats, while just 4 percent said they are Republicans. When you include those who leaned toward either party, though, the Democrats' lead increased to 54 percent to 19 percent.
Another 27 percent favor neither party.
The numbers among Hispanic illegal immigrants were actually slightly better for Republicans than among legal ones.
Among Hispanic legal permanent residents (legal status but not citizens), Democrats led 67-13 percent. And among Hispanics who immigrated to the United States and became citizens, they led 69-17.
Conservatives opposed to a new path to citizenship in the current immigration debate point out that such a path could enfranchise millions of Latino illegal immigrants whose votes currently favor Democrats.
Under the Senate bill, though, illegal immigrants wouldn't become citizens for more than a decade and would have to meet several benchmarks and pay fines. In other words, it's likely that not all of them would pursue that path, and Republicans would have time to woo these new potential voters.