Elizabeth Warren Backs Joe Biden for President

Sen. Elizabeth Warren backed Joe Biden as the presumptive Democratic presidential nominee, becoming the last of his top 2020 rivals to do so.

Ms. Warren, of Massachusetts, ended her Democratic presidential bid in early March after much of the party, including former rivals in the primary, began coalescing around Mr. Biden’s candidacy. She didn’t immediately back either of the two remaining top contenders: Mr. Biden and Sen. Bernie Sanders of Vermont, who ended his bid last week and endorsed the former vice president on Monday.

In a video posted on...