Colorado Senate race
Interest groups and political parties reported spending $33,435,827 on independent campaigning in the Colorado Senate race this year, with $17,953,163 benefiting Republicans and $15,311,279 benefiting Democrats. Back to race list.
| Group | Week before election | Two weeks before election | Three weeks before election | Total |
|---|---|---|---|---|
| Democratic Senatorial Campaign Committee Opposing Ken Buck (R) | $1,208,393 | $1,031,075 | $859,581 | $7,519,782 |
| American Crossroads Opposing Michael F. Bennet (D) Supporting Ken Buck (R) | $1,236,423 | $1,190,101 | $938,261 | $6,167,671 |
| National Republican Senatorial Committee Opposing Michael F. Bennet (D) Supporting Ken Buck (R) | $1,128,449 | $1,699,429 | $674,545 | $5,132,330 |
| U.S. Chamber of Commerce Opposing Michael F. Bennet (D) Supporting Jane Norton (R) | $0 | $1,000,000 | $0 | $2,147,763 |
| National Education Association Opposing Ken Buck (R) | $547,000 | $0 | $1,350,000 | $1,897,000 |
| Americans for Job Security Opposing Jane Norton (R) Supporting Ken Buck (R) | $0 | $0 | $0 | $1,553,126 |
| American Federation of State County and Municipal Employees Opposing Ken Buck (R) | $528,513 | $720,208 | $0 | $1,248,721 |
| Campaign Money Watch Opposing Ken Buck (R) | $0 | $0 | $375,000 | $1,146,000 |
| Club for Growth Opposing Michael F. Bennet (D) Supporting Ken Buck (R) | $397,815 | $1,743 | $75 | $1,011,193 |
| League of Conservation Voters Opposing Ken Buck (R) Supporting Michael F. Bennet (D) | $197,126 | $211,482 | $288,000 | $896,539 |
| Women's Voices Women Vote Action Fund Opposing Ken Buck (R) | $55,009 | $723,466 | $99,971 | $878,446 |
| National Rifle Association Opposing Michael F. Bennet (D) Supporting Ken Buck (R) | $86,090 | $218,919 | $35,100 | $746,078 |
| Commonsense Ten Opposing Ken Buck (R) | $175,663 | $150,000 | $116,711 | $540,485 |
| First Amendment Alliance Opposing Michael F. Bennet (D) Supporting Ken Buck (R) | $104,300 | $164,990 | $0 | $498,360 |
| Senate Conservatives Fund Supporting Ken Buck (R) | $14,212 | $31,427 | $0 | $383,847 |
| Sierra Club Opposing Ken Buck (R) Supporting Michael F. Bennet (D) | $28,633 | $157,408 | $28,977 | $215,017 |
| Citizens for Strength and Security Supporting Michael F. Bennet (D) | $0 | $0 | $0 | $207,920 |
| National Association of Manufacturers Michael F. Bennet (D) | $0 | $0 | $0 | $171,385 |
| New Leadership in Colorado Opposing Michael F. Bennet (D) | $0 | $0 | $0 | $120,138 |
| Clean Water Action Supporting Michael F. Bennet (D) | $14,445 | $14,158 | $21,406 | $100,106 |
| Environment Colorado Supporting Michael F. Bennet (D) | $87,142 | $5,724 | $0 | $92,866 |
| Right to Life Supporting Ken Buck (R) | $24,721 | $0 | $27,343 | $91,844 |
| Bull Moose Sportsmen's Alliance Action Fund Supporting Michael F. Bennet (D) | $0 | $63,442 | $27,599 | $91,041 |
| Cooperative of American Physicians Supporting Ken Buck (R) | $10,000 | $75,000 | $0 | $85,000 |
| Working America Opposing Ken Buck (R) Supporting Michael F. Bennet (D) | $7,580 | $11,520 | $10,445 | $75,000 |
| RightChange.com Opposing Michael F. Bennet (D) | $0 | $19,281 | $25,742 | $64,304 |
| Americans for Working Families Supporting Michael F. Bennet (D) | $0 | $0 | $0 | $63,933 |
| Progressive USA Opposing Ken Buck (R) | $50,167 | $0 | $0 | $50,167 |
| Service Employees International Union Supporting Michael F. Bennet (D) | $0 | $0 | $0 | $50,000 |
| National Wildlife Federation Supporting Michael F. Bennet (D) | $15,000 | $13,540 | $0 | $28,540 |
| Focus on the Family Action Supporting Ken Buck (R) | $0 | $28,238 | $0 | $28,238 |
| Progressive Future Incorporated Supporting Michael F. Bennet (D) | $19,601 | $3,595 | $0 | $23,195 |
| NARAL Pro-Choice America Opposing Ken Buck (R) Supporting Michael F. Bennet (D) | $90 | $191 | $10 | $21,158 |
| VoteVets.org Opposing Ken Buck (R) | $0 | $20,000 | $0 | $20,000 |
| People for the American Way Opposing Ken Buck (R) Supporting Michael F. Bennet (D) | $9,924 | $5,563 | $0 | $15,486 |
| FreedomWorks Supporting Ken Buck (R) | $1,443 | $0 | $0 | $13,362 |
| American Conservative Union Supporting Ken Buck (R) | $10,031 | $0 | $0 | $10,031 |
| Susan B Anthony List Supporting Jane Norton (R) | $0 | $0 | $0 | $8,996 |
| Coalition to Protect Seniors Opposing Michael F. Bennet (D) | $0 | $0 | $0 | $7,584 |
| The Advocacy Fund Supporting Michael F. Bennet (D) | $1,071 | $3,382 | $0 | $4,453 |
| Revere America Opposing Michael F. Bennet (D) | $3,437 | $0 | $0 | $3,437 |
| MoveOn.org Supporting Michael F. Bennet (D) | $0 | $2,181 | $0 | $3,053 |
| America's Voice Opposing Ken Buck (R) | $1,848 | $0 | $0 | $1,848 |
| National Treasury Employees Political Action Committee Supporting Michael F. Bennet (D) | $0 | $207 | $0 | $207 |
| Campaign for Community Change Opposing Ken Buck (R) | $176 | $0 | $0 | $176 |
NOTE: Totals represent spending in calendar year 2010 and will change as new filings are made or information is amended. Data includes "electioneering communication" and electronically-filed "independent expenditure" spending reported to the Federal Election Commission. Spending on "issue ads" targeting candidates will not be included if it is more than 30 days before a primary or more than 60 days before the general election. "Weeks on list" shows the total number of weeks that a group or race has been in the top ten throughout the year.
By T.W. Farnam and Nathaniel Vaughn Kelso -- The Washington Post
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