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
SOURCES: Federal Election Commission filings; Washington Post research

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