Keith OlbermannMSNBC has suspended prime-time host Keith Olbermann indefinitely without pay for contributing to the campaigns of three Democratic candidates this election season. Olbermann acknowledged to NBC that he donated $2,400 apiece to the campaigns of Kentucky Senate candidate Jack Conway and Arizona Reps. Raul Grivalva and Gabrielle Giffords.

NBC News prohibits its employees from working on, or donating to, political campaigns unless a special exception is granted by the news division president - effectively a ban. Olbermann's bosses did not find out about the donations until after they were made. The website Politico first reported the donations.

"I became aware of Keith's political contributions late last night," Phil Griffin, MSNBC's chief executive, said Friday. "Mindful of NBC News policy and standards, I have suspended him indefinitely without pay."