What's funny is that there are people who support him.
Easy for you to say- you don't have to be around them, and you won't have him as your leader. :/
If it is any comfort to you, European countries have some daft politicians too. Not all get worldwide footage, but that does not mean they are non existent. And people who will vote for them are around, in all their annoyingness.
Not to kill the thread, but the dude has been using rhetoric that's scary-similar to what Hitler used. He's running on a platform of divisiveness, hate, and fear.
I honestly think he would be uniquely bad for the country- he'd do genuine harm to the US, and he'd fuck up our foreign relations even worse than they already are. (Except he and Kim Jong-un could be drinking buddies, as I've heard pointed out).