Trump, RNC back Roy Moore despite sexual misconduct allegations

Trump has fully endorsed Roy Moore as he faces accusations from at least eight women, including one who alleges she dated Moore as a 17-year-old when he was in his 30s.
3:15 | 12/05/17

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Transcript for Trump, RNC back Roy Moore despite sexual misconduct allegations
We move on to major new developments in the Alabama senate race. President trump is now openly backing candidate Roy Moore and the Republican national committee has reversed course reinstating the support the party suspended after several women accused Moore of sexual misconduct. Election day just one week away and Tom llamas with all the latest. Reporter: The president, the RNC, all of that working in Roy Moore's favor and the timing couldn't be better for his campaign but those allegations against him of sexual misconduct with teenagers still looms large over this race. Alabama senate candidate Roy Moore riding a new wave of trump support. The president now fully endorsing him and this morning, the RNC back to supporting Moore when just over a week ago, the head of the RNC said this. Allegations were obviously very concerning and concerning to the degree that we pulled our resources. The Alabama voters are going to have to be the judge and jury on this. They're going to have to look at the women that have come forward with these very concerning allegations. Reporter: But overnight, ABC news learning the RNC is now changing course and will be sending resources to Alabama where tonight Moore will rally with Steve Bannon, the president's former chief strategist. He's a courageous man and most importantly he's a righteous man. Reporter: Bannon helped Moore win in the primary. Moore posting on Twitter the president told him he needs a fighter to help him in the U.S. Senate. But the glowing support from the white house comes as eight women have accused Moore of a range of inappropriate behavior including two who said Moore sexually assaulted them when they were teenagers. But I now know for sure that he is a liar. Reporter: Debbie Wesson Gibson said she was 18 and he was in his 30s when they dated and penned this note to him when she graduated from high school. She is outraged that he is saying on the campaign trail he doesn't know any of his accusers. Specifically I do not know any of these women. Let me state once again I do not know any of these women. Did not date any of these women and did not engage in any sexual misconduct with anyone. Reporter: Last month in an interview he did acknowledge he knew Gibson. I can't recall a specific date because that's been 40 years but I remember her as a good girl. Reporter: Though Moore denies all the allegations of sexual misconduct, Gibson says she believes the other women. It's not hard to believe them. It's painful to believe them. It's sad. It takes what I thought was a very lovely part of my past and it colors it and it changes it irrevocably. Reporter: The campaign tells me what Moore is referring to when he says he doesn't know these women are the women who are accusing him of sexual assault. Moore has denied these accusations and the campaign describes Gibson as active in democratic politic, George. Tom, Moore and more signs that the Republican party is in on this. A poll showed more than 70% of Republicans don't believe the women. You have Steve Bannon who the campaign calls rocket fuel for this campaign and, of course, the president backing Moore. Tom llamas, thanks very much.

This transcript has been automatically generated and may not be 100% accurate.

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