Donald Trump has been accused of “rambling” and mixing things up more often, leading some to wonder if the former president is merely setting himself up for an insanity defense in court. A former prosecutor says that it won’t work. Trump recently held a press conference during which he talked about a box of Cheerios that was being used as a prop for the ex-president to speak about inflation issues. At one point, Trump said he was going to take the cereal back to his “cottage” and have a “lot of fun.” Trump was also accused Saturday of forgetting in which state his campaign rally was held. Want…