One of the most bitter congressional races is in the suburbs of Chicago, where controversial freshman Republican Joe Walsh is fighting to keep a seat he was actually drawn out of.
The Tea Party favorite's bombastic rants frequently get him into trouble, even with members of his own party, and Walsh is facing a tough Democratic opponent in Iraq war veteran Tammy Duckworth, who lost both of her legs in combat.
There are 11 gubernatorial races this fall, and one of the most competitive is in the swing state of New Hampshire.
There, Republican Ovide Lamontagne and Democrat Maggie Hassanare vying to replace a popular Democrat who opted not to seek a fifth term. Both political parties and outside advocacy groups are pushing hard in a race where neither candidate enjoys a clear edge.
Rep. David Rivera, R-Fla., was charged Wednesday by Florida authorities with alleged ethics violations while he was in the state Legislature, perhaps imperiling his bid for re-election to the House in an already tight contest.
After saying during a debate Tuesday night that a pregnancy caused by rape is "something that God intended to happen," the Republican candidate for Senate in Indiana is arguing that it is "twisted" to suggest he thinks God wants some women to be raped.