Trump calls Biden 'low I.Q. individual' after verbal slip

President TrumpDonald John TrumpO'Rourke: Trump driving global, U.S. economy into recession Manchin: Trump has 'golden opportunity' on gun reforms Objections to Trump's new immigration rule wildly exaggerated MORE on Monday called Joe BidenJoe BidenPossible GOP challenger says Trump doesn't doesn't deserve reelection, but would vote for him over Democrat Joe Biden faces an uncertain path The Memo: Trump pushes back amid signs of economic slowdown 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!"

Trump has previously deployed the "low I.Q." line of attack against a number of critics, including MSNBC host Mika Brzezinski, Rep. Maxine WatersMaxine Moore WatersBanks give Congress, New York AG documents related to Russians who may have dealt with Trump: report Maxine Waters: Force us to ban assault weapons 'or kick our a--- out of Congress!' Maxine Waters: Escalating killings in US motivated by Trump's 'race baiting' 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 SandersBernie SandersJoe Biden faces an uncertain path Bernie Sanders vows to go to 'war with white nationalism and racism' as president Biden: 'There's an awful lot of really good Republicans out there' 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'RourkeBeto O'RourkeO'Rourke: Trump driving global, U.S. economy into recession 2020 Democrats feel more emboldened to label Trump a racist Hillicon Valley: O'Rourke proposal targets tech's legal shield | Dem wants public review of FCC agreement with T-Mobile, Sprint | Voters zero in on cybersecurity | Instagram to let users flag misinformation MORE, the former Texas congressman, entered the race last week, joining Sanders, Sens. Elizabeth WarrenElizabeth Ann WarrenPossible GOP challenger says Trump doesn't doesn't deserve reelection, but would vote for him over Democrat Joe Biden faces an uncertain path The Memo: Trump pushes back amid signs of economic slowdown MORE (D-Mass.), Kamala HarrisKamala Devi HarrisJoe Biden faces an uncertain path Biden: 'There's an awful lot of really good Republicans out there' Fighter pilot vs. astronaut match-up in Arizona could determine control of Senate MORE (D-Calif.), Amy KlobucharAmy Jean KlobucharPoll: Nearly 4 in 5 say they will consider candidates' stances on cybersecurity The Hill's Campaign Report: Battle for Senate begins to take shape Native American advocates question 2020 Democrats' commitment MORE (D-Minn.) and Cory BookerCory Anthony BookerThe Hill's Campaign Report: Battle for Senate begins to take shape Steve King to Gillibrand: Odds of me resigning same as yours of winning presidential nomination We need a climate plan for agriculture 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.