Progressive Caucus co-chairwoman Rep. Pramila Jayapal Pramila JayapalDHS opens probe into allegations at Georgia ICE facility Progressive Caucus co-chair: Whistleblower complaint raises questions about 'entire detention system' Buttigieg, former officials added to Biden's transition team MORE (D-Wa.) on Monday endorsed former Vice President Joe Biden Joe BidenOmar fires back at Trump over rally remarks: 'This is my country' Trump mocks Biden appearance, mask use ahead of first debate Trump attacks Omar for criticizing US: 'How did you do where you came from?' MORE for president, showing further unification of the Democratic Party ahead of the general election.

"While I have not always agreed with Vice President Biden on matters of policy, I am ready to work with him to craft and then implement the most progressive agenda of any candidate in history," Jayapal, who was a vocal supporter of Sen. Bernie Sanders Bernie SandersButtigieg stands in as Pence for Harris's debate practice Bernie Sanders warns of 'nightmare scenario' if Trump refuses election results Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE's (I-Vt.) campaign, said in a statement.

“Our progressive movement of people organizing in the streets and in the halls of Congress has only grown bigger and more diverse, and we have made enormous strides towards racial, gender, and economic justice," she continued. "We are ready for a President who will encourage us to be as big as we can be, with compassion and bold leadership."

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"That President must be Joe Biden, and I will do everything I can to help him win back the White House, take back the Senate, and preserve our House Majority," she said.

Jayapal's endorsement comes one week after the caucus's other co-chairman, Rep. Mark Pocan Mark William PocanOvernight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Democrats call for investigation into Pentagon redirecting COVID-19 funds Clark rolls out endorsements in assistant Speaker race MORE (D-Wis.) threw his support behind Biden.

Pocan, along with Rep. Ro Khanna Rohit (Ro) KhannaThe Hill Interview: Jerry Brown on climate disasters, COVID-19 and Biden's 'Rooseveltian moment' Congress needs to prioritize government digital service delivery DeJoy defends Postal Service changes at combative House hearing MORE (D-Calif.), who endorsed Biden last week, served as co-chairmen of Sanders's campaign.

Sanders endorsed Biden earlier this month at a virtual event, pledging to do everything in his power to help Biden defeat Trump in November.

The unification of progressives and moderates has happened earlier in 2020 than it did it in 2016, when Sanders did not endorse the 2016 Democratic nominee, Hillary Clinton, until roughly two weeks before the party's July convention.

Biden has received a number of endorsements from Democrats of all stripes in recent days, including Speaker Nancy Pelosi Nancy PelosiPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare House lawmakers reach deal to avert shutdown Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill MORE (D-Calif.) on Monday.