Donald Trump bragged again about how he “aced” a cognitive test designed to test for dementia — and then he got the name of the White House doctor who gave him it wrong. Dr. Ronny Jackson was not only Trump’s doctor while president, he’s also a Texas Republican congressman and a staunch ally of the former president who even attended his New York criminal trial. The flub came as Trump was criticizing President Joe Biden’s mental capacity. Want more breaking political news? Click for the latest headlines at Raw Story. “I think he should take a cognitive test like I did,” the former president sai…