Joe Biden talked down to a “climate change” activist on Monday after she said she was concerned about his flip-flop on SuperPACs.

A video published by Sunrise Movement shows an activist politely confronting Biden in a crowd, “Since you’ve reversed and are not taking SuperPAC money, how can we trust that you’re not fighting for the people profiting off climate change…”

“Look at my record, child,” he said, getting in her face. “Look at my record.”

“But your record is you fighting to go into the Iraq War, and—” she said before he cut her off.

“No, that’s not right,” he responded, before turning away.

Biden recently flipped on the idea of a SuperPAC, and caught heat from other candidates as a result.

“It’s disappointing that any Democratic candidate would reverse course and endorse the use of unlimited contributions from the wealthy to run against fellow Democrats,” Sen. Elizabeth Warren, who has kept her word to shun PAC money, posted to Twitter. “A handful of wealthy donors should not be allowed to buy the Democratic nomination. That’s not who we are.”

Socialist Sen. Bernie Sanders’ campaign manager, Faiz Shakir, offered a similar response to the Washington Post.

“The former vice president has been unable to generate grassroots support, and now his campaign is endorsing an effort to by the primary thro8ugh a super PAC that can rake in unlimited cash from billionaires and corporations,” Shakir wrote. “That’s not how we defeat Trump.

“It’s a recipe to maintain a corrupt political system which enriches wealthy donors and leaves the working class behind.”