A wave of Democratic senators have called for their colleague Sen. Al Franken, D-Minn., to resign.

Sens. Mazie Hirono of Hawaii, Claire McCaskill of Missouri, Kirsten Gillibrand of New York, Maggie Hassan of New Hampshire, Kamala Harris of California, Patty Murray of Washington, and Tammy Baldwin of Wisconsin were the first to say Franken should step aside in what appeared to be a coordinated release late Wednesday morning. Franken has been accused of sexual harassment and misconduct by a series of women during the past month.

After the initial statements, the first seven female senators were joined by Bob Casey of Pennsylvania, Sherrod Brown of Ohio, Joe Donnelly of Indiana, Debbie Stabenow of Michigan, Heidi Heitkamp of North Dakota, Michael Bennet of Colorado, Ed Markey of Massachusetts, Maria Cantwell of Washington, Dick Durbin and Tammy Duckworth of Illinois, Patrick Leahy of Vermont, Martin Heinrich and Tom Udall of New Mexico, Jeff Merkley of Oregon and Tom Carper of Delaware.

Bernie Sanders of Vermont and Angus King of Maine, independents who caucus with the Democrats, also called on Franken to resign.

Al Franken, D-Minn., on November 27. (Jim Watson/AFP/Getty Images)More

Earlier Wednesday morning the latest accuser had stepped forward, saying that Franken had tried to forcibly kiss her, an allegation Franken denied. Wednesday morning also was the release of Time magazine’s Person of the Year, which went to “The Silence Breakers,” women and men who had stepped forward about being sexually assaulted and harassed.

In the wake of the calls for his resignation, Franken tweeted that he would make an announcement on Thursday.

Today, I am calling on my colleague Al Franken to step aside. I’ve struggled with this decision because he’s been a good Senator and I consider him a friend. But that cannot excuse his behavior and his mistreatment of women. (thread)

— Senator Mazie Hirono (@maziehirono) December 6, 2017

Al Franken should resign.

— Claire McCaskill (@clairecmc) December 6, 2017

As elected officials, we should be held to the highest standards—not the lowest. The allegations against Sen. Franken describe behavior that cannot be tolerated. While he’s entitled to an Ethics Committee hearing, I believe he should step aside to let someone else serve.

— Kirsten Gillibrand (@SenGillibrand) December 6, 2017

It is clear that Al Franken has engaged in a pattern of egregious and unacceptable behavior toward women. He should resign.

— Sen. Maggie Hassan (@SenatorHassan) December 6, 2017

I’m shocked and appalled by Senator Franken’s behavior. It’s clear to me that this has been a deeply harmful, persistent problem and a clear pattern over a long period of time.

It’s time for him to step aside.

— Senator Patty Murray (@PattyMurray) December 6, 2017

Sexual harassment and misconduct should not be allowed by anyone and should not occur anywhere. I believe the best thing for Senator Franken to do is step down.

— Kamala Harris (@SenKamalaHarris) December 6, 2017

I believe it is best for Senator Franken to resign.

— Sen. Tammy Baldwin (@SenatorBaldwin) December 6, 2017

Last month Franken said he was “embarrassed and ashamed” because of the allegations but looked forward to getting back to work. The Senate Ethics Committee announced in a statement Nov. 30 that it had opened a preliminary inquiry into Franken’s alleged misconduct. Democratic Rep. John Conyers resigned from Congress Tuesday after a series of sexual harassment allegations.

Democratic National Committee Chairman Tom Perez also added his voice to the chorus, tweeting that Franken should step down. Were Franken to resign, his replacement would be selected by Gov. Mark Dayton, a Democrat.

Read more from Yahoo News:

For Democrats in 2018, how many candidates are too many?The stuffed elephant in the room: Trophies, hunters, and Donald TrumpJapan’s atomic dilemma: Pacifism and the threat of North KoreaTrump video retweets could be playing with firePhotos: Storm chaser captures extraordinary images