Sen. Elizabeth Warren (D-Mass.) is eclipsing President Biden with endorsements and, at times, as the Democrats' leading voice on major issues, including abortion and canceling student debt.
Why it matters: The progressive's prominence is pressuring the incumbent president and White House to move left. It's also raising questions about her ambitions, especially as the Democratic Party faces electoral apocalypse this fall and questions about whose voice — and issues — are best to rebound.
