We'll never (luckily!) see any actual evidence, but that's just one of those things you hear and go "yeah, that sounds about right". I don't have any doubt that POTATUS has a larger budget for diapers than Estonia's defense budget, or that he's so far advanced into dementia that he would bust one while talking to a member of the British royal family. I remember when people used to make fun of Reagan and say he was senile. He may have been at the end, but Pedo Joe makes him look like an energetic teenager in comparison.