A billionaire is in hot water after using his massive social media following to spread the claim that Joe Biden has a major brain-impairing disorder. Hedge fund billionaire Bill Ackman, who was previously verbally “curb stomped” by Biden’s granddaughter, posted the following to more than a million of his followers on X, formerly known as Twitter: “I just spoke to one of the most respected doctors in the world. He says that it is eminently apparent that [President] Biden has lewy body dementia, Parkinson’s and/or Alzheimer’s and that his decline will not be linear.” Want more breaking political…