Disgraced Maine U.S. Senate candidate Graham Platner will not formally withdraw from the race until Monday, the last day under state law he can drop out and enable Democrats to pick a replacement.

Platner, a progressive Democrat, announced Wednesday night that he was suspending his campaign in the wake of an allegation of sexual assault, shuttering an insurgent campaign that had withstood months of controversy.

Politico reported that a woman alleged Platner sexually assaulted her in 2021, and another woman who dated Platner on and off alleged to The Washington Post that Platner removed condoms without her consent during sex.

Platner vehemently denied the claims in a video posted on social media but acknowledged that his candidacy couldn't move forward as major backers, such as Sens. Bernie Sanders, I-Vt., and Elizabeth Warren, D-Mass., withdrew their support and urged him to exit the race.

His pending withdrawal could hamper Democrat hopes of unseating incumbent Republican Sen. Susan Collins and retaking control of the upper chamber.

Before he publicly announced Wednesday night that he was suspending his campaign, Platner privately told staff that he planned to officially file paperwork to end his campaign Monday, Axios reported Thursday.

"On Monday, I entire — I intend to file the requisite paperwork with the secretary of state to remove my name from the ballot," Platner said, according to Axios, citing a person on the call.

The Hill reported Thursday that a source close to the campaign confirmed Platner privately told staff he will file the paperwork Monday.

Under state law, Platner has until 5 p.m. Monday to drop out of the race in time for the party to replace him. As of about 1 p.m. Thursday, Platner had not officially withdrawn from the race, Axios reported.

"No official withdrawal notice has yet been received from Mr. Platner," Jana Spaulding, deputy secretary of state for communications, told Axios. "A public declaration is not an official withdrawal, and a candidate must formally withdraw to the elections office in writing, including signature."

Multiple Democrats have already emerged as potential replacements.

The Maine Democratic Party said earlier this week that Platner's team would have "no role" in determining his successor. On Wednesday, shortly before Platner said he was suspending his campaign, the state party announced it would hold a nominating convention to pick his replacement in the event of a vacancy, Axios reported.

The convention is expected to include roughly 600 delegates, including 500 chosen from county parties and 100 state committee members.