Lori Lightfoot, Chicago Mayor, was brutally surprised after she showed up at a union fundraiser.

Fox News reports that she was “drowned out” by boos immediately.

After speaking for less than a minute, she was “booed off the stage.”

“Almost deafening,” one person explained. The witness requested anonymity from Fox News.

“I was sitting at the table with a bunch of plumbers. They’re like, `We’ve never heard that before here.’”

“Clearly, their membership is not with her,” the witness continued. “They were calling her names. It was bad.”

“I knew that was going to happen,” another person said off-camera in the video below.

one person said in the video, “That’s f—-ing brutal”

Watch the clip:

The rude gesture was made during an annual fundraiser by Plumbers Union Local 130.

During the 2019 runoff election, the union was the first one to support her back.