President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE on Monday called 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 a "low I.Q. individual" after the former vice president had a slip of the tongue and nearly announced he was running for president in 2020.

"Joe Biden got tongue tied over the weekend when he was unable to properly deliver a very simple line about his decision to run for President," Trump tweeted. "Get used to it, another low I.Q. individual!"

Joe Biden got tongue tied over the weekend when he was unable to properly deliver a very simple line about his decision to run for President. Get used to it, another low I.Q. individual! — Donald J. Trump (@realDonaldTrump) March 18, 2019

Trump has previously deployed the "low I.Q." line of attack against a number of critics, including MSNBC host Mika Brzezinski, Rep. Maxine Waters Maxine Moore WatersPowell, Mnuchin stress limits of current emergency lending programs Pelosi: House will stay in session until agreement is reached on coronavirus relief Omar invokes father's death from coronavirus in reaction to Woodward book MORE (D-Calif.) and actor Robert De Niro.

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The president was seizing on a mishap from Biden over the weekend where he told a gathering of Delaware Democrats that he has "the most progressive record of anybody running for the ... anybody who would run" for the 2020 nomination.

Attendees began applauding as Biden repeated the phrase, "Of anybody who would run."

Biden has long been mulling a presidential campaign for 2020 and is considered a near certainty to jump in the race.

The former vice president has been an ardent critic of the president, and caused a stir last year when he said he would have "beat the hell out of" Trump in high school over his degrading comments about women.

Biden has typically hovered at or near the top of polling among Democrats on their preferred 2020 candidate.

A poll released earlier this month showed Biden was the top choice among likely Iowa Democratic caucus participants, garnering 27 percent of the vote. 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.) was the first choice of 25 percent of those surveyed.

Should Biden officially announce his candidacy, he would join an increasingly crowded field of presidential hopefuls.

Beto O'Rourke Beto O'RourkeJimmy Carter says his son smoked pot with Willie Nelson on White House roof O'Rourke endorses Kennedy for Senate: 'A champion for the values we're most proud of' 2020 Democrats do convention Zoom call MORE, the former Texas congressman, entered the race last week, joining Sanders, Sens. 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.), 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.), Amy Klobuchar Amy KlobucharSocial media platforms put muscle into National Voter Registration Day Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (D-Minn.) 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, among others.

Trump has previously welcomed the idea of facing off against the former vice president, calling him a "dream opponent."

Last week, he declined to say whether he viewed Biden or O'Rourke as a stronger challenger, telling reporters "Whoever it is, I'll take him or her on."

Updated at 9:46 a.m.