I have similar questions, but it isn't simply Trump: Why do Americans spend so much to protect POTUS? If I were president, I'd make the Secret Service make changes. Here's my starting list:
Ditch the beast and get a decent looking car -- The president isn't in a warzone after all.
Reopen Pennsylvania Ave -- why is it closed?
Remind them that the President is simply a man. The position is what's important and the Constitution has what to do if that man dies
The cost of protecting POTUS is outrageous in my view