Morris Katz, a top adviser to Graham Platner who helped recruit him to run for senate, said he was "deeply disappointed" by the sexual assault allegations that caused him to drop out of the race.

"As soon as the team became aware of the rape allegations against Graham Platner we advised he suspend his candidacy, and in the following days worked to wind down the campaign," Katz wrote on X on Thursday.

"Like so many of his supporters, I’m deeply disappointed," Katz said.

Katz, who also advises New York City Mayor Zohan Mamdani and other progressive candidates.

Platner filed the pape work to officially end his campaign Friday afternoon, according to a letter he posted on X.

Katz helped produce Platner’s launch video that went viral and led to his campaign catching fire, eventually becoming the person Democrats dreamed would finally beat Republican incumbent Sen. Susan Collins, considered the most vulnerable Republican incumbent in the 2026 midterm elections.

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

Platner has denied the allegations.

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.

Collins, seeking a sixth term, is the only Senate Republican defending a state that President Donald Trump did not win in 2024. Democrats must flip four seats to win back the Senate.