Trump campaign manager calls Clintons an 'ethical stain'

Donald TrumpDonald TrumpPoll: Clinton leads Trump by 6 points nationally 4 ways the election really is rigged, Mr. Trump Campaign collusion: Is CNBC’s John Harwood too close to the Clinton operation? MORE's campaign manager early Monday said Hillary ClintonHillary Rodham ClintonPoll: Clinton leads Trump by 6 points nationally 4 ways the election really is rigged, Mr. Trump Campaign collusion: Is CNBC’s John Harwood too close to the Clinton operation? MORE is "a serial liar" and called the Democratic presidential nominee and her husband, former President Bill ClintonBill ClintonCrooked Hillary skates again as America reaches the crossroads Trump, Clinton in mad scramble in campaign's closing days The issue with Comey's statement is Trump campaign hypocrisy MORE, an "ethical stain."

"We don't need this ethical stain that has been Bill and Hillary Clinton for decades now to continue. I think you'd need more than bleach bit to get rid of that type of ethical stain," Kellyanne Conway said on MSNBC's "Morning Joe."

"The Democrats made a huge mistake by nominating someone they know is a serial liar, has a history of having a casual relationship with the truth, of always putting Hillary first."

Conway argued that Hillary Clinton's lead in the polls began to slip before the news that the investigation into Clinton's use of a private server while secretary of State was under new review by the FBI.

Last week, FBI Director James Comey sent a letter to lawmakers, alerting them that newly discovered emails from a separate investigation may be relevant to the Clinton server.

"If you're an undecided voter, you're very decided about Hillary Clinton. There's really nothing else you were going to learn about her in these last eight to 10 days that is going to change their mind," Conway added.