It was the first time Warren mentioned Trump by name while stumping in Iowa, and she quickly returned to her campaign message, one that advocates a "level playing field" for all Americans. I am in this fight for working families.
Though Warren announced the formation of a presidential exploratory committee Monday, the weekend events had all the trappings of a full-blown campaign.
In October, Warren announced the results of a controversial DNA test that showed there was "strong evidence" of Native American ancestry, "likely in the range of six to 10 generations ago".
Warren's visit is an effort to gain an early advantage in the state. Taking the mic at the crowded Orpheum Theater, she asked Warren why she took a DNA test to prove her Native American ancestry after Trump called it into question. "I am not a citizen of a tribe".
Senator Elizabeth Warren is making her rounds through Iowa this weekend with one stop Saturday morning in Sioux City. (Well, she's formed an explatory committee, which is a bit like saying you're thinking about a vacation as you board the plane to Miami). "Tribes-and only tribes-determine tribal citizenship, and I respect that difference" between ancestry and citizenship.
She then shifted back to her core message: "What I can do is I can be in this fight for all of our families".
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"I got into this race because I'm deeply grateful to an America that gave opportunities to the daughter of a janitor and I just want to see those same opportunities for all of our kids", Massachusetts Senator, Elizabeth Warren said.
In Sioux City, she grounded her pitch in her own family's life story, relating how they nearly fell into poverty when her father had a heart attack in middle age and her mother feared losing their house, which was saved when her mom got a minimum wage job.
Warren also denounced potential billionaire candidates who plan on self-funding their campaigns.
But despite her popularity, Ms Obama has repeatedly said she has no intentions of running for president.
While Warren appears eager to take on President Donald Trump in 2020, she will have to convince others, including many in her own state, that she is the right candidate.
Iowa's caucuses, local political meetings held statewide and run by the party, are scheduled to begin the 2020 nominating campaign in February 2020. Elizabeth Warren, D-Mass., accompanied by her husband Bruce Mann, Thursday, Jan. 3, 2019, in the Old Senate Chamber on Capitol Hill in Washington. It serves as a first glimpse of what she may look like as a 2020 candidate.
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Some of Tlaib's classmates were pursued for reaction - standard results when a political ally says something that raises eyebrows. But more importantly, the video clearly represented who she is, what she believes, and what the liberal base wants.
High school senior Maggie Bashore said she was curious, but looking for someone younger than Warren, who is 69. "But I have had a chance to talk about Medicaid, partly because I think we've had a national conversation about health care, and I think it's been enormously valuable".
Kirsten Gillibrand, a senator from NY and former lawyer, is being touted as a contender but may be on the outer with some influential Democrats after she said Bill Clinton should have resigned over the Monica Lewinsky scandal.
Outside Warren's debut event on Friday night, Natalie Wertz, 29, who was waiting for the candidate with a friend - both of them having purchased pink T-shirts emblazoned with Warren's de facto slogan, "Nevertheless, she persisted" - spoke confidently of Warren's potential as a candidate.
Asked how she planned to prevent a repeat of the "undemocratic behavior between the DNC and Hillary's campaign in 2016 against Sen. I don't have any power to do that", Warren continued, to which another audience member shouted out, "Yes you do!"
During Warren's most recent re-election bid, the Fund raised $4.9 million.
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Ultima Thule was named for a mythical, far-northern island in medieval literature and cartography, according to Nasa. Scientists wanted New Horizons observing Ultima Thule during the encounter, not phoning home.