A Democratic super PAC is spending heavily against businessman John Brunner who has yet to win the GOP nomination.

After Texas win, the tea party super PAC looks north

New ad uses 9/11 footage to blast Obama on American security

New ads from its super PAC hit at Republican congressmen

Republican Jewish groups run anti-Obama ads as Romney visits Israel

Ads aimed mostly at Democrats cost the U.S. Chamber of Commerce $5.9 million

Republicans run with out-of-context "you didn't build that" Obama comment

Super PAC runs ad linking tea party favorite Cruz to criminal

Super PAC's ad buy is one of the largest of the election so far

Financier George Soros’s son starts a super PAC to support candidates who want tougher campaign finance rules. How ironic.