The price tag to help candidates win is reaching record levels.
Candidates are expected to spend a staggering $3.5 billion by Election Day. When broken down, it comes out to about $4 million for every congressional race. About a billion is paying for political advertising.
Evan Tracey, with Kantar Media, says that the way ad dollars are being spent is different in 2010.
"Traditionally, what you would see right now is groups cutting off people that they didn't think had a chance to win. Now, they're adding more races, so you're seeing the ad landscape get wider and wider as you get close to Election Day," he said.
An example of that is the National Republican Campaign Committee, which is airing commercials in 90 congressional districts. That's double the number from 2008.