Use this interactive to track campaign spending by interest groups and political parties in the 2010 midterm elections. Interest group spending increased dramatically in 2010 following a series of Supreme Court rulings on campaign finance, including the landmark Citizens United v. Federal Election Commission.
Spending by top groups (see full list) :
| Group | Week before election | Two weeks before election | Three weeks before election | 2010 Total | Partisanship |
|---|---|---|---|---|---|
| Democratic Congressional Campaign Committee | $24,398,376 | $15,462,539 | $9,726,970 | $63,244,600 | 100% Democratic |
| National Republican Congressional Committee | $1,686,074 | $10,246,133 | $11,945,387 | $44,525,486 | 100% Republican |
| Democratic Senatorial Campaign Committee | $9,782,093 | $7,595,991 | $5,191,754 | $39,412,938 | 100% Democratic |
| American Crossroads | $8,416,112 | $8,694,259 | $7,278,516 | $38,114,259 | 100% Republican |
| U.S. Chamber of Commerce | $272,000 | $10,499,006 | $1,067,266 | $31,774,779 | 93% Republican |
| National Republican Senatorial Committee | $10,903,145 | $6,405,441 | $3,599,719 | $25,830,910 | 100% Republican |
| American Action Network | $2,110,750 | $3,564,500 | $8,616,182 | $15,456,618 | 100% Republican |
| American Federation of State County and Municipal Employees | $1,796,103 | $2,404,736 | $350,928 | $11,688,922 | 100% Democratic |
| Service Employees International Union | $383,982 | $1,033,159 | $1,706,012 | $9,478,942 | 100% Democratic |
| American Future Fund | $356,285 | $173,795 | $461,885 | $9,247,920 | 100% Republican |
Spending in top races (see full list) :
| Race, incumbent | Week before election | Two weeks before election | Three weeks before election | Total | Partisanship |
|---|---|---|---|---|---|
| Colo. Sen. Michael F Bennet, D | $5,964,300 | $7,566,269 | $4,878,765 | $33,435,827 | 54% Republican |
| Pa. Sen. OPEN, Arlen Specter, D | $7,009,393 | $6,484,877 | $3,576,575 | $25,006,890 | 56% Republican |
| Wash. Sen. Patty Murray, D | $4,877,437 | $6,749,887 | $2,502,141 | $18,557,727 | 56% Republican |
| Ill. Sen. OPEN, Roland Burris, D | $5,598,075 | $4,805,430 | $2,712,369 | $18,059,569 | 62% Republican |
| Nev. Sen. Harry Reid, D | $3,336,666 | $4,786,748 | $1,822,714 | $16,849,010 | 59% Republican |
| Mo. Sen. OPEN, Christopher Kit Bond, R | $425,366 | $1,641,622 | $2,109,775 | $12,392,244 | 59% Republican |
| Calif. Sen. Barbara Boxer, D | $3,942,549 | $2,595,559 | $242,244 | $11,779,256 | 83% Republican |
| Ark. Sen. Blanche Lincoln, D | $73,697 | $91,118 | $61,214 | $11,749,014 | 89% Democratic |
| W.Va. Sen. OPEN, Carte Goodwin, D | $2,446,084 | $2,791,182 | $1,913,011 | $10,346,409 | 54% Republican |
| Ky. Sen. OPEN, Jim Bunning, R | $1,727,581 | $2,691,439 | $1,247,861 | $8,639,509 | 71% Republican |
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
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