Did the Obama administration bribe Sestak, Romanoff, and now possibly Torsella to drop out of Senate Primaries?

First there were claims about Sestak and Romanoff. Now there is Joe Torsella:

President Obama's nominee for a high-level United Nations reform position dropped out of the U.S. Senate race in Pennsylvania last year shortly after Sen. Arlen Specter switched parties and won an endorsement from the White House.
Joe Torsella, chairman of the Pennsylvania State Board of Education, was nominated this week for U.S. ambassador for the U.N. Management and Reform, a post that has been vacant since Obama took office.
A spokesman for Pennsylvania Gov. Ed Rendell, who appointed Torsella to the chairmanship, told the Philadelphia Daily News that he was not aware of the U.N. job but has "recommended Joe to the White House for a number of positions."
Rendell was among the Democratic leaders who embraced Specter in the race, which drew national publicity after his primary opponent, Rep. Joe Sestak, revealed that the White House tried to lure him out of the contest with a high-level job.
The White House later disclosed that it had former President Bill Clinton offer Sestak an unpaid position on an intelligence advisory board if he would stay in the House. But Sestak went on to defeat Specter in the primary and lose to Republican Pat Toomey this month in the general election. . . .
The White House did not respond to an e-mail seeking comment. Torsella did not return messages requesting an interview.
John Bolton, the U.S. ambassador to the U.N. during the Bush administration, told FoxNews.com that Torsella's nomination raises a number of questions about his background, including his experience working to eliminate waste, fraud and abuse from government programs. . . .