Donald TrumpDonald TrumpOvernight Defense & National Security — Presented by Boeing — Milley warns of 'Sputnik moment' for China WSJ publishes letter from Trump continuing to allege voter fraud in PA Oath Keeper who was at Capitol on Jan. 6 runs for New Jersey State Assembly MORE's campaign manager early Monday said Hillary ClintonHillary Diane Rodham ClintonTrump to attend World Series Game 4 in Atlanta Pavlich: Democrats' weaponization of the DOJ is back Mellman: The trout in the milk MORE is "a serial liar" and called the Democratic presidential nominee and her husband, former President Bill ClintonWilliam (Bill) Jefferson ClintonBiden needs to be both Mr. Inside and Mr. Outside Republican spin on Biden is off the mark Bill Clinton shares video update after release from hospital 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."

ADVERTISEMENT

"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.