Warren: 'I'm not going to run'

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Sen. Elizabeth WarrenElizabeth Ann WarrenOvernight Energy: BLM staff face choice of relocation or resignation as agency moves | Trump says he's 'very much into climate' | EPA rule would expand limits on scientific studies Krystal Ball credits Gabbard's upswing in 2020 race to 'feckless' Democratic establishment Outsider candidates outpoll insider candidates 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 ClintonFive landmark moments of testimony to Congress Top diplomat said request for specific probes in Ukraine was 'contrary' to US policy Feehery: What Republicans must do to adapt to political realignment 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.”