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

President TrumpDonald John Trump2020 Democrats spar over socialism ahead of first debate Senate passes .5 billion border bill, setting up fight with House 'Teflon Don' avoids the scorn of the 'family values' GOP — again MORE on Monday called Joe BidenJoe Biden'Teflon Don' avoids the scorn of the 'family values' GOP — again Don't expect Trump-sized ratings for Democratic debates Hickenlooper laughs off lack of recognition by security guard at Democratic debate 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 WatersHillicon Valley: Senate bill would force companies to disclose value of user data | Waters to hold hearing on Facebook cryptocurrency | GOP divided on election security bills | US tracking Russian, Iranian social media campaigns House panel to hold hearing on Facebook cryptocurrency project On The Money: S&P hits record as stocks rally on Fed cut hopes | Facebook's new cryptocurrency raises red flags for critics | Internal IRS watchdog rips agency's taxpayer service | Apple seeks tariff relief 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 Sanders2020 Democrats spar over socialism ahead of first debate 'Teflon Don' avoids the scorn of the 'family values' GOP — again Don't expect Trump-sized ratings for Democratic debates 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'RourkePoll: Biden leads Democratic field by 6 points, Warren in second place The Hill's 12:30 Report: Anticipation high ahead of first debate Warren visits migrant care shelter, says children being marched 'like little prisoners' MORE, the former Texas congressman, entered the race last week, joining Sanders, Sens. Elizabeth WarrenElizabeth Ann WarrenDon't expect Trump-sized ratings for Democratic debates Poll: Biden leads Democratic field by 6 points, Warren in second place Senate Health Committee advances bipartisan package to lower health costs MORE (D-Mass.), Kamala HarrisKamala Devi HarrisPoll: Biden leads Democratic field by 6 points, Warren in second place 2020 Dems say they will visit Homestead facility holding migrant children Warren visits migrant care shelter, says children being marched 'like little prisoners' MORE (D-Calif.), Amy KlobucharAmy Jean KlobucharPelosi: Congress will receive election security briefing in July 2020 Dems say they will visit Homestead facility holding migrant children The Hill's 12:30 Report: Anticipation high ahead of first debate MORE (D-Minn.) and Cory BookerCory Anthony BookerBooker calls for hearings on reports of ICE using solitary confinement Poll: Biden leads Democratic field by 6 points, Warren in second place The Hill's 12:30 Report: Anticipation high ahead of first debate 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.