Joe Sestak, winner of the Pennsylvania Democratic Senate primary, is refusing to provide more information on what job he was offered by a White House official to drop of that race, although he confirmed again that the incident occurred.

The White House was backing incumbent Sen. Arlen Specter (D-Pa.) in the primary. Sestak acknowledged in an interview in February that he was offered a position by an unnamed White House official – a potential violation of federal law – but has not offered any specifics on conversation. Republicans are trying to use the issue against Sestak in the November Senate race.

“It’s interesting. I was asked a question about something that happened months earlier, and I felt that I should answer it honestly, and that’s all I had to say about it.” Sestak said Sunday on NBC’s “Meet the Press.” “Anybody else has to decide on what they will say upon their role. That’s their responsibility.”

Yet Sestak confirmed to NBC’s David Gregory that the incident did take place.

“I was offered a job, and I answered that,” Sestak said. “Anything that goes beyond that is for others to talk about.”