I think a lot of Americans are so fed up with their usual presidential fare that they'll accept virtually anything Trump does. Let's not forget there are plenty of ugly skeletons in the past of many a past president, including JFK whose undoubted charisma has blinded a great many people to the various things he got up to. Clinton's period in office was hardly whiter than white but because he talks the right sort of talk a lot of people are seemingly willing to overlook his transgressions...
It wasn't that many years before Trump was being rude about women during a private conversation, that the then President Clinton was engaged in appalling behaviour in the Oval Office. Rightly or wrongly, many will say he was actually doing what Trump was only bragging about...