The crowd at President Trump’s rally in Michigan broke out in an impassioned chant of “AOC sucks,” in reference to freshman Rep. Alexandria Ocasio-Cortez, on Thursday night.

Donald Trump Jr. was speaking in advance of his father’s appearance at the campaign rally when he ripped into Ocasio-Cortez for mistakenly calling the three branches of government “chambers.”

“Think about the fact that every mainstream leading Democratic contender is taking the advice of a freshman congresswoman who three weeks ago didn’t know the three branches of government,” Trump Jr. said while mocking Ocasio-Cortez’s Green New Deal.

“I don’t know about you guys, but that’s pretty scary.”

The crowd then broke out into a raucous cheer of “AOC sucks!” while Trump laughed and told them, “You’re not very nice, and neither is what that policy would do to this country.”

Ocasio-Cortez made the flub during an Instagram livestream chat with supporters in November, which she recorded at home while making soup.

“If we work our butts off to make sure that we take back all three chambers of Congress — uh, rather, all three chambers of government: the presidency, the Senate, and the House in 2020,” she said during the livestream that was recorded four months ago.

The “AOC sucks!” slogan was similar to the 2016 campaign chant of “Lock her up!” — a reference to another female Democrat, Hillary Clinton, whom Trump accused of committing crimes for using a private email server while serving as secretary of state.

Ocasio-Cortez’s Green New Deal was defeated 57-0 in a procedural vote in the Senate earlier this week.