The Republican National Committee has lost one of its top fundraisers amidst a backdrop of scandals hounding RNC Chairman Michael Steele.

Sam Fox, a former US ambassador to Belgium and hearty supporter of President George W. Bush, has resigned a senior position within the Party's fundraising ranks, Politico's Ben Smith reported Monday.

The position, Smith says, was unpaid but important. Fox was a co-chairman of the Republican Regents, a Republican fundraising cabal.

Fox was "deeply troubled by the pattern of self-inflicted wounds and missteps," a Republican fundraiser purportedly told Smith Monday, and had "lost confidence" in Steele. The fundraiser also said that Fox was finding it harder to raise money under Steele's darkening cloud.

More RNC defections are expected, Smith said.

Fox was a major funder of the "Swift Boat Veterans for Truth," a group that hyped bogus information about 2004 Democratic presidential nominee John Kerry. The onetime ambassador and businessman gave $50,000 to the Swift Boat group in 2004.

Fox is also a former chairman of the Republican Jewish Coalition.

Republican Chairman Michael Steele has been dogged by statements he's made on television that insiders say have hurt the party. Last week, it emerged that the RNC had reimbursed a staffer for thousands of dollars of expenses at a risqué Beverly Hills club.

On Monday, Steele said he was taking flak because of his race. In response, White House press secretary Robert Gibbs remarked, "I think Michael Steele's problem isn't the race card, it's the credit card."

Steele made the comment early Monday on Good Morning America when asked if he was judged more harshly because he is black.

"The honest answer is, 'yes,'" Steele said. "It just is. Barack Obama has a slimmer margin. A lot of folks do. It's a different role for me to play and others to play, and that's just the reality of it. But you take that as a part of the nature of it."