A topless protester disrupted Sen. Bernie Sanders’ campaign rally in Nevada on Sunday — moments after Mayor Bill de Blasio introduced the Democratic presidential candidate to the stage.

De Blasio had just introduced Sanders to the crowd in Carson City as the “next president of the United States,” when Sanders entered the stage with his wife as the song “Power to the People” played.

That’s when a fully clothed woman jumped up and tried to wrest the microphone out of the Vermont senator’s hand, before grabbing another one from the lectern, and started speaking about the candidate’s support for dairy farmers.

“Bernie, I’m your biggest supporter, and I’m here to ask you to stop pumping up the dairy industry and to stop pumping up animal agriculture,” she said. “I believe in you…” she continued, before the mic suddenly went dead and security moved toward her.

Sanders moved to the edge of the stage as a string of women then paraded across holding images of cows — followed by a topless woman, who gestured to Sanders as members of his security detail positioned themselves between the two.

“This is Nevada. There’s always a little excitement — at no extra cost. Except we have a lot of water on the stage,” he said as he returned to the stage.

The protesters were prompted by the senator’s support in 2018 for legislation that provided emergency financial support for dairy farmers across the country because of the falling price of milk.

It’s not the first time a Sanders rally has been disrupted by a topless protester: A woman showed up at a March 2016 rally in Arizona with the words “Stop Fascism” on her back and “Hate speech is not free” on her front.

De Blasio announced his support for Sanders this weekend after backing Hillary Clinton in 2016.