Donald J. Trump and his allies have begun investigations to support their claims that Joseph R. Biden Jr. was incapacitated ...

Progressive Rep. Crockett appeared at House investigators' interview with Ashley Williams, expressing no concerns about Biden ...

Former president says he made every decision, as investigations intensify into autopen use and cognitive fitness.

Rep. Jasmine Crockett, D-Texas, contended that former President Joe Biden's "supreme" mental acuity is "a thousand times better" than President Trump's on Katie Couric's "Next Question" podcast on ...

Former President Biden's reliance on teleprompters at small fundraisers angered donors who paid thousands for personal ...

MAGA loyalists and congressional Republicans are lashing out at Joe Biden’s former physician.

The doctor’s lawyers cite President Trump as precedent, referencing his own invocation of the Fifth Amendment.

Former President Joe Biden's White House physician declined to answer questions before a House Committee as the GOP-led panel ...

This is unprecedented, and I think that this adds more fuel to the fire that there was a cover-up,” House Oversight chairman ...

"Look, Biden was never for open borders," Trump told Bartiromo on Sunday Morning Futures. "Biden was never for transgender, ...

Acclaimed psychologist and former Johns Hopkins professor Dr. John Gartner made some of the most disturbing claims during a ...

Trump has said he has no proof of his claims. ... With questions swirling about Biden’s mental acuity in office, Trump and his allies have put forward the theory that someone else was using the ...