Bill Cassidy

Sen. Bill Cassidy, R-La., speaks to reporters, Thursday, Oct. 19, 2017, on Capitol Hill in Washington. (AP Photo/Jacquelyn Martin) ORG XMIT: DCJM107

U.S. Sen. Bill Cassidy of Louisiana has withdrawn his support for embattled Republican Senate candidate Roy Moore of Alabama over allegations of sexual misconduct by Moore decades ago.

"Based on the allegations against Roy Moore, his response and what is known, I withdraw support," Cassidy said in a tweet Saturday afternoon.

Earlier Saturday, Moore defiantly insisted the allegations were false and voters in Alabama would "see through this charade."

The candidate, speaking at the Mid-Alabama Republican Club in Vestavia Hills, Alabama, showed no signs of backing down despite the demand of a growing number of Washington Republicans for him to step aside.

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Moore made his first public appearance on Saturday since The Washington Post on Thursday published interviews with four women who said Moore had tried to have sexual or romantic relationships with them decades ago - when they were teenagers and Moore was in his 30s and an established attorney.

A wave of national Republican leaders, including Senate Majority Leader Mitch McConnell, called for Moore to drop out of the race if the allegations are true. Trump, who is in Asia and said he was too busy to keep up with the news about Moore, referred to a prior statement given to reporters that said Trump believes Moore will "do the right thing..." if the allegations are true.

Information from The Associated Press was included is this report.