Trump says Biden has been 'brainwashed': 'He's been taken over by the radical left'

President TrumpDonald TrumpFormer Sen. Heller to run for Nevada governor Overnight Defense & National Security — Milley becomes lightning rod Joint Chiefs Chairman Milley becomes lightning rod on right MORE said Thursday that former Vice President Joe BidenJoe BidenOvernight Defense & National Security — Milley becomes lightning rod Democrats hope Biden can flip Manchin and Sinema On The Money — Presented by Wells Fargo — Democrats advance tax plan through hurdles MORE (D) has been “brainwashed” by the “radical left.” 

“Joe is just, look let's face it, he's been taken over by the radical left. He has no clue what they're doing,” Trump said in an interview with Fox News anchor Sean HannitySean Patrick Hannity90 percent of full-time Fox Corp. employees say they're fully vaccinated: executive The Memo: California recall exposes the limit of Trump's GOP Republicans divided on Trump's strength as possible 2024 candidate MORE

“They brainwashed him, he doesn't know where he is, he doesn’t know what he's doing and our country will suffer. Our stock markets will crash, bad things will happen,” Trump added. 

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The president also referenced a “deal” he says Biden, the presumptive Democratic nominee, made with Sen. Bernie SandersBernie SandersWarren, Daines introduce bill honoring 13 killed in Kabul attack trillion tax hike the opposite of 'good investment' Progressive groups call for Puerto Rico Fiscal Control Board to be abolished MORE (I-Vt.).

Trump was seemingly referring to the Democratic platform released Wednesday by the Biden-Sanders Unity Task Force. The platform laid out recommendations on a number of key issues, but it fell short of Sanders’s push for radical change. 

Trump told Hannity that Biden is “worse than Bernie Sanders at his best.”

“He has been completely taken over, I think it’s because he doesn’t understand what's going on,” Trump said.  

Trump, 74, dismissed accusations that Biden, 77, isn’t fit for the job due to his age. The president said he knows “other people in their late 80s, early 90s” that are “100 percent mentally sharp.”

Trump also repeated his call for Biden to take a cognitive test, like the one Trump claims he “aced.” 

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“I took one very recently when the radical left was saying, ‘Is he all there, is he all there?’ I proved it, because I aced it. He should take the very same test,” Trump said. 

A spokesperson for the Biden campaign was not immediately available for comment in response to Trump’s attack. 

Biden has also attacked Trump’s cognitive ability and fitness for office.