Massachusetts Democratic Sen. Elizabeth Warren announced on the last day of 2018 she is officially forming a presidential exploratory committee in a bid to run for the presidency in 2020.

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

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Speculation regarding the Massachusetts senator’s presidential aspirations have been swirling for months. In June, she announced that she would not be running for president, however, less than three months later she seemingly flipped on her word, revealing she would, in fact, take a “hard look” at launching a presidential campaign following the midterms. During an interview leading up to her November election, Warren refused to commit to serving her full term in the Senate if re-elected.

Warren has also been quietly shopping for office space in the Boston area to headquarter her possible presidential campaign, according to a report earlier in December. And on Sunday night, she changed the name of her twitter account from “elizabethforma” to “ewarren,” removing her home state of Massachusetts. (RELATED: Elizabeth Warren Introduces Legislation To Create A Government Run Pharmaceutical Manufacturer)

The list of Democratic senators who are mulling over their own challenge to President Donald Trump in 2020 is continuing to expand. Following midterm elections, Democratic Sens. Sherrod Brown of Ohio and Amy Klobuchar of Minnesota announced they are both considering a presidential run. New York Sen. Kirsten Gillibrand acknowledged she might be walking back her promise to serve out her full six-year Senate term if she is elected to the seat because of her potential presidential campaign.

Other senators who are rumored to be planning a presidential run include: Democratic Sen. Cory Booker of New Jersey, Independent Sen. Bernie Sanders of Vermont and Democratic Sen. Kamala Harris of California. Democratic Sen. Jon Tester of Montana predicted as many as “13 or 14” senators could end up running.

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