Democratic Sen. Elizabeth Warren on Monday announced her intention to run for president in 2020 as a champion of middle-class Americans and a foe of big banks and Wall Street fat cats.

Warren, who said she was creating an exploratory committee that will allow her to raise funds and hire staffers, will be among a crowded field of Democrats taking a shot at the White House.

“America’s middle class is under attack,” Warren said in a four-minute, 30-second video posted to YouTube. “How did we get here? Billionaires and big corporations decided they wanted more of the pie. And they enlisted politicians to cut them a bigger slice.”

In the video, the 69-year-old former law professor lays out her vision of the future, while setting herself up as a foil to President Trump and members of his administration.

“I’ve spent my career getting to the bottom of why America’s promise works for some families, but others who work just as hard slip through the cracks into disaster,” she says. “What I’ve found is terrifying. These aren’t cracks that families are falling into, they’re traps.”

The Republican National Committee dismissed Warren’s candidacy, saying her “out of touch” agenda poses no threat to Trump.

“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,” Chairwoman Ronna McDaniel said in a statement.

The president, who has announced that he will seek re-election in 2020, has trashed Warren in the past for her claims that she is partly Native American, referring to her as “Pocahontas.”

Warren in October released DNA testing results that showed there was “strong evidence” that she has Native American blood.

The release was intended to quell questions about her heritage but prompted criticism from Native American leaders and left some supported puzzled why she would rekindle the controversy.

A number of Democrats are expected to announce presidential campaigns in the next few months, including former Vice President Joe Biden and Sens. Bernie Sanders of Vermont, Kamala Harris of California, Cory Booker of New Jersey and Kirsten Gillibrand of New York.

Former Mayor Michael Bloomberg and Texas Rep. Beto O’Rourke, who lost a Senate bid in November to GOP Sen. Ted Cruz, are also weighing getting in the race.