With U.S. Sen. Elizabeth Warren’s endorsement Wednesday morning, Joe Biden now has the support of every major Democratic candidate who once sought the prize he now has in sight: the White House.

On Tuesday, Biden was endorsed by his former boss, former President Barack Obama endorsed Biden. On Monday, U.S. Sen. Bernie Sanders endorsed Biden less than a week after he ended his own presidential bid.

Warren posted this announcement on social media Wednesday:

Warren dropped out of the race last month, shortly after a disappointing third-place finish in her home state of Massachusetts. She refused to immediately endorse Biden or her fellow liberal Sanders.

Bernie Sanders endorses Joe Biden for president

Two other prominent Democrats who have yet to publicly back Biden are former President Bill Clinton and Hillary Clinton, the party’s 2016 nominee. Hillary Clinton has been in regular touch with Biden, including several times since Sanders dropped out of the race, according to an aide.

Barack Obama endorses Joe Biden for president

Biden, a 77-year-old white male, is the only candidate remaining from a once-historically crowded field of Democratic contenders, a field that also included a record number of women and minorities.

Biden has been on a roll since the South Carolina primary. A crucial endorsement from influential South Carolina Rep. Jim Clyburn and a subsequent, larger-than-expected victory in South Carolina propelled the former vice president into Super Tuesday, when he won 10 of 14 states.

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In a matter of days, his top former Democratic rivals lined up and announced their endorsement of Biden. The former vice president’s campaign had appeared on the brink of collapse after New Hampshire but found new life as the rest of the party’s more moderate establishment coalesced around him as an alternative to Sanders.