An aide to Sen. David Vitter resigned Wednesday after reports he pled guilty to attacking an ex-girlfriend with a knife.

Both parties are having problems with their base in North Carolina's 8th district.

Businessman Tim D'Annunzio (R) pointedly refused to endorse former broadcaster Harold Johnson after he lost to him in the GOP House runoff on Tuesday.

"I will say first and foremost that I cannot endorse Harold Johnson and his underhanded campaign tactics," D'Annunzio said in a statement. "What he's done is a continuation of politics as usual, and for that I will not be supporting him."

Johnson, who will face Rep. Larry Kissell (D-N.C.) in November, had called D’Annunzio "a troubled man" in TV ads that describe "a history of drug use and time in prison."

The Democratic incumbent has his own problems.

Kissell had a mediocre showing in his May primary. And earlier this month, the Service Employees International Union qualified an independent candidate to run against him. Kissell angered unions and progressive Democrats by voting against the healthcare reform bill in March.

A longtime aide to Sen. David Vitter (R-La.) has a history of legal problems, including a knife fight.

The Republican Party got the results it wanted from Tuesday's primaries — for the most part.

Arizona Democrats facing tough reelection races are distancing themselves from the Obama administration as it prepares to file a lawsuit against the state over its controversial immigration law.

Given Utah's red-state status, Tea Party favorite Mike Lee (R) is expected to win the Senate race in November.

Rep. Jim Matheson (D-Utah) successfully beat back a primary challenge from his left Tuesday.

Two South Carolina Republicans who received the backing of former Alaska Gov. Sarah Palin emerged victorious in their runoff elections Tuesday.

Palin had endorsed gubernatorial candidate Nikki Haley and publicly stuck with her amid allegations of an extramarital affair. She also endorsed Republican Tim Scott against Paul Thurmond in South Carolina's 1st congressional district.

That makes Palin two for two Tuesday. She stayed out of the Republican Senate runoff in Utah between Tim Bridgewater and Mike Lee, making her win-loss record for this cycle 9-3, according to an analysis by The Hill.

Republican Tim Scott earned a landslide victory against Paul Thurmond in a South Carolina House primary runoff.