BOSTON (AP) — Another Republican candidate has jumped into the Massachusetts U.S. Senate race.

Ian Cain on Winning ExchangeWednesday formally launched his campaign. He’s the second Republican to take on incumbent Democratic U.S. Sen. Elizabeth Warren as she runs for her third term.

Cain has served as Quincy’s first city councilor who is Black and out as gay. He is also the founder of a startup that is a blockchain technology incubator. He has taken aim at Warren, saying she is working for herself instead of the people of Massachusetts.

“What’s worse is that she’s incapable of delivering real results because she’s so bogged down in extreme partisanship,” Cain said in a campaign video. Cain said he grew up in Quincy.

The 41-year-old said he is running to “usher in the next generation of leadership, where leaders focus on embracing the innovation economy and the new digital world.”

Republican John Deaton, a former U.S. Marine and cryptocurrency attorney, is also challenging Warren.

Deaton, who was born in Detroit and recently moved to Massachusetts, has highlighting his hardscrabble upbringing, his years in the Marines serving as a judge advocate at Marine Corps Air Station in Yuma, Arizona; and his career as a lawyer in part representing victims of mesothelioma.

Deaton, 56, has cast himself as a fighter for the working and middle classes.

Both Republicans face a steep climb against Warren, 74, a former Harvard law professor who has twice won a Senate seat, and came in third in Massachusetts in her 2020 bid for president.

Warren currently has more than $4 million in her campaign account.