I have been proofreading all of Trump's tweets from 2009 to present. And there are a couple things I have picked up on.

He loves entrepreneurs.

He DOES NOT always use a capital C when describing our country.

Some misspelled words(most, actually) are just predictive text issues. For example; nearly EVERY TIME he tries to type counsel, it first appears as " councel" but is almost always corrected in a following tweet.