A top aide to U.S. Democratic presidential contender Hillary Rodham Clinton said on Sunday that criticism of her remarks in Saturday's debate regarding 9/11 and Wall Street campaign contributions would not resonate with average voters.

"They were attacking her for being too close to Wall Street," communications director Jennifer Palmieri said of a tense exchange among Clinton, Vermont Sen. Bernie Sanders, her chief rival for the Democratic nomination, and former Maryland Gov. Martin O'Malley at the party's debate in Iowa.

"The point she was making, is that as a senator, she did things for Wall Street, particularly after 9/11, but she also spoke out as a senator and now when she thought they were going too far," Palmieri told reporters.