Sen. Elizabeth Warren (D-Mass.) joined a growing list of Democrats endorsing Rep. Keith Ellison (D-Minn.) for chair of the Democratic National Committee on Wednesday.

Warren praised Ellison’s work on the House Financial Services Committee and his leadership within the Congressional Progressive Caucus in a statement announcing her endorsement.

“I’ve watched up close as he has pushed hard to try to hold Wall Street accountable through his work on House Financial Services, and he has consistently exercised bold leadership for the Congressional Progressive Caucus,” Warren said.

Ellison was a supporter of Sen. Bernie Sanders (I-Vt.) in the Democratic primary but threw his support behind Hillary Clinton in the general election. He is the first Muslim elected to Congress and the first black congressman from Minnesota.

Sanders was one of the first top Democrats to endorse Ellison since he announced his DNC run on Monday. Clinton has yet to endorse anyone for the position previously held by Rep. Debbie Wasserman Schultz (D-Fla.).

Other top Democrats, including the outgoing Senate minority leader, Harry Reid (Nev.), and his successor, Chuck Schumer (N.Y.), have also endorsed Ellison.

Other candidates to lead the Democratic Party include Howard Dean, who served as DNC chair from 2005 to 2009, and Jamie Harrison, chair of the South Carolina Democratic Party. Ilyse Hogue, president of the reproductive rights group NARAL, is the only woman known to be looking at a bid for the position. Former Maryland Gov. Martin O’Malley withdrew his name from consideration on Wednesday.