Sen. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.) said Tuesday that she is not going to run for president in 2016.

"I’m not running, and I’m not going to run," Warren said on NBC's "Today," seeking to end speculation among progressives that she might challenge likely front-runner Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE.

"I’m in Washington. I’ve got this really great job, and a chance to try and make a difference on things that really matter."

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Progressive groups like MoveOn.org and Democracy For America are working to draft Warren into the race. Polls show former Secretary of State Clinton would be the clear favorite, but liberal groups have raised concerns about her Wall Street ties and say Warren could push the debate to the left on crucial issues.

Warren said that "there's a lot to fight over right this minute" to keep her busy in Congress.

"I want a world where every kid gets a fighting chance," she added, promoting her book, A Fighting Chance.

Warren did not endorse Clinton, who is expected to announce her candidacy in the coming weeks.

She also sidestepped a question from NBC's Savannah Guthrie about whether Clinton was the right candidate to fight for the middle class.

“I think we need to give her a chance to decide if she’s going to run and to lay out what she wants to run on,” Warren answered. “I think that’s her opportunity to do that.”