Should he be King?
If he should win the 2024 election, and become president again, perhaps he should be called "President King Donald Trump".
https://uploads.dailydot.com/1ae/22/200df8684f5fce77.jpg?auto=compress%2Cformat&ixlib=php-3.3.0
Think about it, look at how much adversity the man will have overcome. Something only a king could do.