Donald Trump Jr. posted a meme calling Mitt Romney “a p—y” Wednesday after the Utah senator said he’d vote to convict Trump Jr.’s father in the impeachment trial.

Trump Jr. shared shared the image — which features Romney wearing “mom jeans” and the words “because you’re a p—y” — on Instagram and demanded Romney be booted from the Republican Party.

“Mitt Romney is forever bitter that he will never be POTUS. He was too weak to beat the Democrats then so he’s joining them now. He’s now officially a member of the resistance & should be expelled from the @GOP,” he wrote, along with the meme.

Earlier in the day, Romney vowed to vote to convict President Trump of committing impeachable acts in his dealings with Ukraine, breaking with his Republican colleagues.

“The grave question the Constitution tasks senators to answer is whether the president committed an act so extreme and egregious that it rises to the level of a high crime and misdemeanor. Yes, he did,” the Utah senator said in a speech on the Senate floor, before becoming the only GOP senator to vote against President Trump.

But ultimately, the Republican-led Senate acquitted Trump on Wednesday for his dealings with Ukraine, ending a months-long impeachment process.