Former Vice President Joe Biden Joe BidenOmar fires back at Trump over rally remarks: 'This is my country' Trump mocks Biden appearance, mask use ahead of first debate Trump attacks Omar for criticizing US: 'How did you do where you came from?' MORE reached out to several supporters Tuesday saying he intends to run for president in 2020, according to a new report.

The Wall Street Journal reported Tuesday that Biden told his supporters that he was worried he would be unable to raise large sums of money in the hours following his announcement. Former Rep. Beto O’Rourke (D-Texas) and Sen. Bernie Sanders Bernie SandersButtigieg stands in as Pence for Harris's debate practice Bernie Sanders warns of 'nightmare scenario' if Trump refuses election results Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (I-Vt.), both of whom are running for president, raised eyebrows when they announced they had raised $6.1 million and $5.9 million, respectively, in the first 24 hours of their campaigns.

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A Biden spokesperson did not immediately respond to a request for comment from The Hill.

The Journal reported that a source said Biden told supporters Tuesday that he feels he needs to put up strong numbers immediately after his announcement as an indicator of his overall strength as a candidate. The source said he is mulling setting up an exploratory committee sometime after Easter.

Sources have told The Hill that Biden is almost certain to enter an already crowded Democratic presidential primary field, though he has yet to make his candidacy official.

“I have the most progressive record of anybody running for,” he said this weekend before rephrasing to “anybody who would run” for president.

However, Biden has received criticism from what he called the “new left” for not being progressive enough on key issues such as health care and immigration.

The former vice president, who has already run for president twice, likely would run in a more establishment lane than several other primary contestants who are angling their appeals toward the party’s progressive wing.

Should he jump in, Biden would join Sanders, O’Rourke, and Sens. Kamala Harris Kamala HarrisButtigieg stands in as Pence for Harris's debate practice First presidential debate to cover coronavirus, Supreme Court Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (D-Calif.), Elizabeth Warren Elizabeth WarrenHarris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda Judd Gregg: The Kamala threat — the Californiaization of America GOP set to release controversial Biden report MORE (D-Mass.) 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.), among others, in the primary race.