Republicans on the Senate Judiciary Committee on Wednesday requested that the Obama administration appoint a special prosecutor to probe allegations it offered Rep. Joe Sestak (D-Pa.) a job to stay out of the Pennsylvania Senate Democratic primary.
In a letter to Attorney General Eric Holder, the members say the alleged offer could have violated federal laws that prohibit the "promise of employment or other benefit for political activity."
Republicans have escalated pressure on the White House and Sestak to reveal what, if anything, was offered to Sestak to give Sen. Arlen Specter (D-Pa.) — whom President Barack Obama endorsed — a clear path for reelection.
Republican senators who signed the letter are: Ranking Member Jeff Sessions (Ala.), Orrin Hatch (Utah), Chuck Grassley (Iowa), Jon Kyl (Ariz.), Lindsey Graham (S.C.), John Cornyn (Texas) and Tom Coburn (Okla.)
Several months ago, Sestak claimed he received an offer from the White House. At the time, Sestak was trailing the Republican-turned-Democratic senator, but eventually beat him in the primary last week.
Sestak confirmed his claim on the Sunday talk-show circuit last weekend, but declined to elaborate further.
It's not clear how the White House will respond to the letter; officials have remained mum on the subject in recent days despite taking repeated questions from the press about the topic.
White House press secretary Robert Gibbs referred reporters to comments he made in March; he did not say specifically what was said in the conversations with Sestak, but made assurances that nothing improper happened.
Several high-profile Democrats have also called on the White House and Sestak to clear the air, including Senate Majority Whip Dick Durbin (Ill.), a close ally of Obama.
House Oversight and Goverment Reform Committee ranking member Darrell Issa (R-Calif.), who has led the charge in calling for a probe, has called the offer an "impeachable offense" if proven true.
Pennsylvania Gov. Ed Rendell (D), who on Wednesday called for more information, said he is sure nothing illegal happened, but that the incident has become a distraction.