Warren, who was asked about plans to make a run for president during an appearance on NBC's "Today" show, said she was "running in 2018 for senator from MA".
Cruz's address came amid growing publicity surrounding the release of Democratic Senator Elizabeth Warren's book, a move which resembles many pre-election book releases by former presidential candidates.
Warren said, "Look we all have a lot of regrets, but my biggest regret is that Donald Trump is president of the United States period..." She was asked if the book was kicking off a possible bid for the White House.
Ms Warren has earned a reputation as a "fighter" for her repeated critiques of Mr Trump, and for a now-infamous interaction with Senate Majority Leader Mitch McConnell on the Senate floor. Will the White House be forced to give in? Or rather, the total lack of one, as Warren told the Boston Globe last week she'd "spoken to him, but he has not spoken to me".
The group plans to send operatives with video cameras to track Warren's public appearances, launch Freedom of Information Act requests to dig up records, and hit her in the press with the goal of damaging her both in 2018 and ahead of 2020.
Almost six in 10 voters, or 57 percent, said they had favorable views of Sanders, giving the Vermont senator who failed to win the 2016 Democratic nomination the highest favorability of among respondents, the poll found.
"OK, you're not biting, I get it", Lauer said. "This is my 11th book". Are you likely to run?' 'No.
She added: "We got to keep a focus not on what says, what he tweets. My life's work is about what's happening to working families across this country", she said.