Donald Trump and his allies have already purged eight of the 10 House Republicans who voted to impeach him after the Jan. 6, 2021, riot at the Capitol. The former president could add a ninth to the list on Tuesday.

Rep. Dan Newhouse narrowly survived Trump’s attempt to take him out two years ago but faces perhaps a stiffer challenge this year. Taking no chances, the former president has endorsed two of Newhouse’s opponents: former NASCAR driver Jerrod Sessler and 2022 Senate nominee Tiffany Smiley.

Of the so-called “Impeachment 10,” only Newhouse and Rep. David Valadao of California remain in Congress. And it’s not a coincidence that both come from states with open, top-two primaries, in which all the candidates run on one ballot, with the top two finishers advancing to the general election, regardless of party.

Newhouse’s vote to impeach Trump earned him the disapproval of the state Republican Party, which is backing Sessler. And many voters in the district told POLITICO last week they were not happy with Newhouse, accusing him of not showing up to local events and not taking a strong enough stance on issues like the border — an issue mentioned more often than his impeachment vote.