How is this only coming to light now? Given the pervasiveness of this I'm surprised there wasn't a single tip that the media could've picked up on. Or maybe there was, and they suppressed it.
Given the age range of candidates from Clinton/Bush Jr. to now, and how neither side is worried that their candidates will end eventually up like Reagan, there's a good chance that something behind the scenes is happening.
United States citizens have gotten used to senile white guys making stupid statements as the head of their country. It's embarrassing, but quite natural for most of us at this point.