Donald Trump is slipping into dementia and experts in the field are unable to sound their alarm for fear of their jobs, according to one psychologist. Trump on Saturday headlined multiple rallies, where he made numerous verbal slip-ups. In one case, the former president appeared to say “Venezwheregullah.” One psychologist would say that his speech mishaps were “consistent with a diagnosis of dementia.” Another psychologist, John Gartner Ph.D., has been issuing similar warnings. He appeared on a podcast on Saturday in which he says he has spoken with experts who are “unwilling to be quoted” but…