Koch-backed nonprofit hits Obama on 'failing agenda'

Republican favorite in U.S. Senate race hit with nonprofit, Democratic Party ads.

The campaign Rep. Brad Sherman, D-Calif., gets a $500,000 boost from the National Association of Realtors

Democratic super PACs gained ground against GOP counterparts and raised big bucks in August

Conservative nonprofit Let Freedom Ring attacks Obama for providing military aid to countries that use child soldiers.

Crossroads GPS and American Crossroads begin $10 million ad campaign that makes them active at all levels of the national election

American Action Network and Congressional Leadership Fund launch ads in four states with more to come

Ads target Florida, Arizona, Ohio, Indiana and Virginia

Race draws $1.4 million in outside spending

New ad takes Romney quote out of context