Rep. Chris Collins of New York is resigning from Congress ahead of his expected guilty plea in an insider trading case.
That’s according to a spokesman for House Speaker Nancy Pelosi, who said Collins has sent a letter of resignation that will take effect when Congress meets in a brief session on Tuesday.
It would be up to Gov. Andrew Cuomo to set a special election to fill the seat, which leans Republican.
Collins, a Republican, was among the first members of Congress to endorse President Donald Trump’s presidential campaign.
More must-read stories from Fortune:
—The 25 most powerful women in politics
—Sanders vs. Warren: How their wealth tax plans differ
—Oprah has advice for the 2020 presidential candidates
—Higher U.S.-international postal rates loom before Christmas
—Can Andrew Yang win in 2020? Inside his unorthodox campaign
Get up to speed on your morning commute with Fortune’s CEO Daily newsletter.