President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE on Thursday shared a mock campaign logo for Sen. Elizabeth Warren Elizabeth WarrenNo new taxes for the ultra rich — fix bad tax policy instead Democrats back away from quick reversal of Trump tax cuts It's time for newspapers to stop endorsing presidential candidates MORE's (D-Mass.) presidential campaign that took aim at her claims to Native American ancestry.

The president tweeted out a photoshopped image that read "Warren 1/2020th," a play on "Warren 2020." The fraction was meant as a reference to DNA test results released in October that showed Warren had a Native American ancestor several generations ago.

The design of the image, which originated with the conservative outlet The Daily Wire, appeared to be based on Sen. Bernie Sanders Bernie SandersSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Schumer, Sanders call for Senate panel to address election security MORE's (I-Vt.) 2016 presidential campaign logo.

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Warren on Monday announced the formation of an exploratory committee to consider a run for the White House, becoming the most prominent Democrat thus far to wade into the 2020 presidential race.

The senator made the announcement in a video sent to supporters and posted on YouTube that highlights her family history, laments the struggles of the middle class and lays out her desire to address economic issues.

Warren is set to make a trip this weekend to Iowa, home of the first caucuses in the presidential primary process.

Asked Monday night about the prospect of running against Warren, Trump welcomed the possibility. He said "you’d have to ask her psychiatrist" whether the senator believes she can win in 2020.

Trump and other conservatives have seized on Warren's past claims of Native American heritage in their opposition to the progressive senator. The president has repeatedly deployed the derisive and racially charged nickname "Pocahontas" to refer to her.

Warren sought to address the criticism in October by releasing the results of a DNA test that showed "strong evidence" she had a Native American ancestor, likely six to 10 generations ago.

The Boston Globe reported in October that the results of the test indicate it's possible Warren is anywhere from 1/64th to 1/1,024th Native American, though her critics have inflated those figures to mock her.

Warren's decision to release her DNA results drew criticism from some Native American groups, who said that blood tests are an inappropriate way to determine heritage.