Justice Democrats, the progressive group that recruited and backed Rep. Alexandria Ocasio-Cortez in her run for Congress in 2016, endorsed Democratic presidential candidate Sen. Bernie Sanders on Sunday.

“I think that he is the best candidate with the strongest contract to be able to defeat Donald Trump and is the only one presenting a vision of the future with solutions that match the scale, scope and urgency of the problems we are facing,” Alexandra Rojas, the executive director of Justice Democrats, said on CNN’s “State of the Union.”

In a tweet on Sunday, the left-wing group cited Sanders’ support for Medicare for all, the Green New Deal, free public college tuition and his fight against income and racial inequality as the reasons for backing Sanders.

Ocasio-Cortez spoke on behalf of Sanders several times in the video.

“In 2016, he fundamentally changed politics in America,” AOC is shown saying during a campaign rally.

Ocasio-Cortez, who worked as an organizer for Sanders’ failed 2016 presidential bid, personally endorsed the candidate last October.

Rojas, in the Twitter video, insists Sanders is building an unbeatable coalition.

“Bernie Sanders is putting together one of the most diverse coalitions ever seen in American history, when it comes to young people, when it comes to people of color,” she says.

“So it’s really, really critical that we also bring in those working-class, blue-collar workers who are attracted to someone who they trust who is really fighting for them, and that person has been Bernie Sanders,” Rojas said.

Former Vice President Joe Biden has been endorsed by one-time Democratic presidential candidates Peter Buttigieg, Sen. Amy Klobuchar, Sen. Kamala Harris, former New York Mayor Mike Bloomberg and former Rep. Beto O’Rourke.

Sen. Elizabeth Warren of Massachusetts, who dropped out of the race after a poor showing on Super Tuesday, has yet to endorse a presidential candidate.