A former Republican–one who once held a leadership position in his local committee–looks with dismay at what has happened to his party. A nugget; follow the link for his evidence.
. . . the party that once honored knowledge, required people to have legitimate credentials, respected science and reason began its descent into insanity. Trump was merely the end piece of what and started over a decade earlier. Now, the bigger lunatic and liar one is, the better one’s chances for rising within the GOP, a party that now clings to every insane conspiracy theory no matter how far fetched.
A quibble: I think the change started several decades earlier than he suggests. It took time for the rot to take root and spread before its fruit fully ripened and burst into view.