Franken, who was elected as a Democratic senator for Minnesota in 2008, responded to the accusations in a statement. Kirsten Gillibrand (D-N.Y.) if she believed the woman who stepped forward on Thursday accusing Franken of groping and kissing her during a USO Tour in 2006, the NY senator replied: "I do".
Earlier Thursday, Tweeden said Franken groped her and kissed her without her consent in 2006 while they were on a USO tour overseas.
Tweeden shared her story - accompanied with a photo of the alleged groping - on the website of KABC, a Los Angeles radio station where she works as a morning news anchor.
Franken issued a short statement after the story gained national traction, and later put out a longer one in which he apologized and said he was wrong to pose for a photo with his hands on Tweeden's chest as she slept on a C-17 cargo plane.
"We're not going to fix the problems of sexual harassment and assault until men take responsibility for their actions and change their behavior", said the MA senator, who has recently collaborated with Franken for several advocacy videos about specific policy issues.
Tweeden has accepted Franken's apology, and told Tapper she believes the senator's apology is "heartfelt".
"I certainly don't remember the rehearsal for the skit in the same way, but I send my sincerest apologies to Leeann".
The Associated Press contributed this report.
CNN has reached out to Tweeden and she's expected to speak Thursday morning with CNN. It isn't amusing. It's completely inappropriate.
The former "Saturday Night Live" star on Tuesday attempted to get ahead of allegations that he sexually assaulted a former Playboy Playmate - joining Senate leaders from both sides of the aisle calling for an investigation.
"I understand why we need to listen to and believe women's experiences", he said. "He groped me, without my consent, while I was asleep", she wrote. "I shouldn't have done it", Franken added. And they deserve to know that I am their ally and supporter. "I hope and expect that the Ethics Committee will fully investigate this troubling incident, as they should with any credible allegation of sexual harassment". There's more I want to say, but the first and most important thing-and if it's the only thing you care to hear, that's fine-is: I'm sorry.
Tweeden credited Congresswoman Jackie Speier's (D-California) account of being assaulted when she was a young Congressional aide as inspiration to come forward.