The Republicans' House campaign committee, in an Internet ad and mailings, links the Democratic challenger in a Pennsylvania race, Kathy Boockvar, with a man convicted of killing a police officer in 1981. Boockvar is challenging Rep. Mike Fitzpatrick, R-Pa. Her husband, a lawyer, represented a witness in the case who later recanted her testimony.
Another GOP committee spot, more playful but still personal, slams Rep. Dave Loebsack, D-Iowa, for dozing off at a meeting on Obama's health care overhaul.
Perhaps the most persistently testy down-ballot contest in the country has been in Massachusetts, where Brown and Warren have shown a clear disdain for each other in two televised debates and a slew of ads.
Brown set the tone early: Near the outset of the candidates' first debate, he criticized Warren for claiming Native American heritage. His opponent "checked the box claiming she is Native American, and clearly she is not," he said. Warren, seeming slightly galled, said her parents told her growing up that her mother was of Native American heritage.
Brown seemed to acknowledge the attack had gotten out of hand when he released a statement condemning staffers who were caught on video doing a "tomahawk chop" and shouting war whoops designed to mock Warren as Brown spoke at a campaign rally.
Warren has mocked Brown for posing nude in Cosmopolitan magazine to pay for law school. More recently, she accused Brown — a married father of two daughters — of being insufficiently committed to women's issues.
"Women need someone they can depend on, not some of the time, but all of the time," she said in one debate.
Brown snapped back, "You should stop scaring women."
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.