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WATCH: Sen. Amy Klobuchar calls for unity during Democratic National Convention

Joe Biden’s former primary rivals are calling on rank-and-file Democrats to put aside any hard feelings and support the former vice president’s campaign.

Watch Klobuchar’s remarks in the player above.

Speaking live from St. Paul, Minnesota, Sen. Amy Klobuchar unveiled a video that also featured New Jersey Sen. Cory Booker, former Texas Rep. Beto O’Rourke, businessman Tom Steyer, New York Sen. Kirsten Gillibrand and entrepreneur Andrew Yang, among others.

“It’s not easy to unite the Democratic Party,” said Washington Gov. Jay Inslee. “Joe Biden has pulled it off.”

Democrats started with a large, historically diverse field of candidates. But while the party is becoming increasing diverse, Biden, a 77-year-old white man, won.

The former rivals said the need to defeat President Donald Trump is just too important to let hard feelings linger.

“There is no cavalry,” O’Rourke said. “We are the cavalry.”