U.S. Rep. Conor Lamb, a prominent Western Pennsylvania Democrat in a swing district carried by Donald Trump in 2016, endorsed Joe Biden for president Sunday, deeming him capable of unifying the country and sticking up for the working class.

In an interview with the Pittsburgh Post-Gazette, Mr. Lamb said he made the decision to endorse the former vice president because he’s focused not only on who can beat Mr. Trump in 2020, but also who can get things done and govern while in the White House. His endorsement is not so much ideological, the freshman congressman from Mt. Lebanon said, as it is on behalf of working-class people in his district who are looking for immediate change.

“You know, they need help now and they can’t afford 10 years of debate over some of these high-flying proposals,” Mr. Lamb said, using language he’s used in the past about the more progressive candidates in the Democratic primary field. “They need someone who can run the ball over the goal line, and I think the vice president can do that.”

According to a Biden campaign official, Mr. Lamb will travel to New Hampshire next weekend to appear as a surrogate for Mr. Biden. No specific details were released.