ESPN says it has severed its relationship with singer Hank Williams Jr. following controversy over his remarks comparing President Barack Obama to Adolf Hitler.

"We have decided to part ways with Hank Williams, Jr. We appreciate his contributions over the past years," a statement on ESPN's site said. "The success of Monday Night Football has always been about the games and that will continue."

The singer apologized Tuesday for his remarks which resulted in "Monday Night Football" pulling his popular musical introduction from this week's game.

"I have always been very passionate about politics and sports and this time it got the best or worst of me,” Williams wrote."The thought of the leaders of both parties jukin' [sic] and high fiven' [sic] on a golf course, while so many families are struggling to get by, simply made me boil over and make a dumb statement, and I am very sorry if it offended anyone. I would like to thank all my supporters. This was not written by some publicist."

Williams made the comparison on Fox News this week when he was asked about Obama and House Speaker John Boehner, a Republican, playing on the same team in a June golf game.