I have not lost any friends over voting for Trump, because I don't actually have all that many friends. I do know that some relatives voted for him, and I just don't discuss it with them, because doing so would not change their minds - and even if they did, en masse, change their minds, it would affect nothing.
But it does occur to me: finding out that someone whom you valued as a friend did, in fact vote for Trump must be like finding out that your clean-cut, friendly neighbor --- is a child molester. It must be incomprehensible, and completely out of the scheme of normal thought.
Fortunately, normal thought is not a problem for Trump supporters. A daily feeding of pseudo-news and hyped garbage, and they're good to go. .