22 percent:

Number of Americans who believe that the Bush administration dismissed U.S. attorneys for “for proper reasons,” compared to 48 percent who believe they were fired because they “refused to be pressured by politics.” Additionally, 55 percent of “Americans believe Bush is refusing to allow top aide Karl Rove and other White House aides to testify under oath ‘because he’s trying to cover up the reasons for the firings,’ not because he ‘wants to preserve the Constitution’s separation of powers'” (33 percent).