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Warren: 'I'm not going to run'

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Sen. Elizabeth WarrenElizabeth Ann WarrenGovernment watchdog finds safety gaps in assisted living homes David Crosby: Shared dislike for Trump could reunite Crosby, Stills, Nash and Young Dem senators tell Trump he doesn’t have ‘legal authority’ to launch preemptive strike on North Korea 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 ClintonHillary Diane Rodham ClintonTrump touts report Warner attempted to talk to dossier author Poll: Nearly half of Iowans wouldn’t vote for Trump in 2020 Rubio on Warner contact with Russian lobbyist: It’s ‘had zero impact on our work’ 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.”