Republicans attack Obama over Bain cancer ad

Karl Rove's Crossroads hits Democratic Senate candidates in Montana, Missouri, others

Americans for Prosperity launches first ad of $25 million campaign

Former steel mill worker links wife's cancer death to Bain buyout

Missouri primary race next up

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