Sen. Elizabeth Warren (D-Mass.) announced her intention on Monday morning to run for the White House by forming an exploratory presidential committee.

Warren had been expected to jump into the upcoming presidential election for some time.

She has support from the more progressive wings of the Democratic Party and has become a vocal critic of President Donald Trump.

She released a video announcing the exploratory presidential committee in a major step toward jumping into the race.

“America’s middle class is under attack,” Warren said in the video announcement.

“How did we get here? Billionaires and big corporations decided they wanted more of the pie,” she added, “and they enlisted politicians to cut ’em a fatter slice.”

Related: Elizabeth Warren Takes DNA Test — See What the Results Actually Reveal

Warren filed papers creating an exploratory presidential committee.

The exploratory committee is an organization established to help determine whether a potential candidate should run for an elected office. This makes her the first major potential 2020 contender among Democrats to do so.

Trump has been highly critical of her — which could either work in her favor or backfire. Progressives strongly dislike the president, which could make her crusades against him a popular move. But he also hits back hard when attacked — which could hurt her.

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He called her out on falsely claiming Native American ancestry until she was forced to admit it wasn’t true.

“Elizabeth Warren is being hammered, even by the Left,” Trump tweeted on October 16 about her. “Her false claim of Indian heritage is only selling to VERY LOW I.Q. individuals!”

Warren even attempted a DNA test, which backfired on her when the results arrived.

The test seemed to show a trace of native ancestry — and publications reported that she was between one-32nd and one-512th Native American.

But the figure was later corrected to be one out of 1,024.

“Sen. Warren couldn’t be more out of touch,” Republican National Committee (RNC) Chairwoman Ronna McDaniel said in a statement provided to LifeZette. “With her lack of support from voters — including in her home state — on top of her phony claim to minority status, now that she is formally running Americans will see her for what she is: another extreme far-Left obstructionist and a total fraud.”

Warren recently won a second term as a Massachusetts senator and is expected to be sworn in this week.

She’s also already started putting together a staff of 70 people and $12.5 million for her campaign account, reported Politico.

This comes after she laid the groundwork for her campaign months earlier.

Related: Elizabeth Warren Says She Will ‘Take a Hard Look’ at Running for President in 2020

The biographical video reportedly covered her roots in Oklahoma, her consumer advocate fights, and her battles against the president. Warren was born in and grew up in Oklahoma, but she eventually moved to Massachusetts, where her career as a senator began.

She has also taught law at a handful of universities across the country.

Former Vice President Joe Biden has been a popular choice among many Democrats for 2020, and he could announce his attentions about running soon.

Sen. Bernie Sanders (I-Vt.) has been considering a run as well and is expected to announce soon whether he will run or not.

“Senator Elizabeth Warren’s formal entrance into the 2020 race for president today helps launch what we believe will be a vibrant discussion of bold, inclusive populist ideas in the Democratic primary,” Democracy for America Executive Director Charles Chamberlaine said in a statement provided to LifeZette. “We look forward to the wide array of progressive candidates that we expect to join her in it in the year ahead.”

Former New York City Mayor Michael Bloomberg might announce his intentions soon as well — he referenced this in interviews over the weekend. “There’s no rush to do it. Everybody wants to know what you’re going to do, and the bottom line is I’m not sure yet,” the billionaire businessman told NBC’s “Meet the Press” in an interview on Sunday.

Related: Battle of the Billionaires? Check Out the Competition in 2020

And Rep. Beto O’Rourke (D-Texas) has said he wouldn’t rule out running.

Warren would also be up against many more possible candidates, such as Sens. Kamala Harris (D-Calif.), Cory Booker (D-N.J.) and Kirsten Gillibrand (D-N.Y.).

Five percent of those surveyed said Warren was their first choice to be the Democratic nominee in 2020, a poll done by Politico and Morning Consult found.

Check out this video:

This piece has been updated