Sen. Elizabeth Warren Elizabeth WarrenJudd Gregg: The Kamala threat — the Californiaization of America GOP set to release controversial Biden report Biden's fiscal program: What is the likely market impact? MORE (D-Mass.), who launched a presidential exploratory committee last month, teased on Thursday that she would be making a major announcement in February about 2020.

“One month ago today, we launched this exploratory committee to build a grassroots movement to level the playing field. On Sat, February 9, I’ll be making a BIG announcement about my 2020 plans. Sign up now to be the first to know where I'll be making it,” Warren tweeted.

One month ago today, we launched this exploratory committee to build a grassroots movement to level the playing field. On Sat, February 9, I’ll be making a BIG announcement about my 2020 plans. Sign up now to be the first to know where I'll be making it. https://t.co/kePILOz4JC pic.twitter.com/Zmv840W524 — Elizabeth Warren (@ewarren) January 31, 2019

Warren, who is likely to announce that she is officially entering what could be the most crowded Democratic primary in modern history, was the first high-profile Democrat to announce her intentions.

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Sens. Kamala Harris Kamala HarrisJoe Biden looks to expand election battleground into Trump country Fox's Napolitano: Supreme Court confirmation hearings will be 'World War III of political battles' Rush Limbaugh encourages Senate to skip hearings for Trump's SCOTUS nominee MORE (D-Calif.) and Kirsten Gillibrand Kirsten GillibrandSunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Suburban moms are going to decide the 2020 election Jon Stewart urges Congress to help veterans exposed to burn pits MORE (D-N.Y.) declared their presidential bids shortly after, and heavy hitters such as former Vice President Joe Biden Joe BidenJoe Biden looks to expand election battleground into Trump country Trump puts Supreme Court fight at center of Ohio rally Special counsel investigating DeVos for potential Hatch Act violation: report MORE, Sens. Bernie Sanders Bernie SandersJacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee Trump campaign plays up Biden's skills ahead of Cleveland debate: 'He's actually quite good' Young voters backing Biden by 2:1 margin: poll MORE (I-Vt.) and Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (D-N.J.), former Rep. Beto O’Rourke (D-Texas) and more could follow.

Warren has already sought to boost her progressive bona fides and separate herself from the rest of the pack by proposing an “ultra-millionaire tax” last weekend for those with a net worth that exceeds $50 million.

Though a proven fundraiser and party heavyweight, Warren has still found herself consistently trailing in national surveys, often polling behind Biden, Harris and Sanders.