New York Mayor Bill de Blasio is running for president, he announced Thursday.

“Donald Trump must be stopped. I’ve beaten him before and I will do it again,” the mayor said in a video published to YouTube called “Working People First,” announcing his campaign.

The two-term mayor plans to travel to Iowa and South Carolina for campaign stops in the coming days, a campaign spokesperson told NBC on Wednesday.

In his first interview since announcing his presidential bid, de Blasio told ABC’s “Good Morning America” that his campaign will “put working people first.”

“I say it very bluntly, there is plenty of money in this world, and there’s plenty of money in this country, it’s just in the wrong hands,” de Blasio said. “All Americans deserve that kind of opportunity to live a better life.”

Protestors outside the “Good Morning America” studio in Times Square could be heard chanting “liar, liar, liar” during the interview.