Doesn’t take much to see Trump has a reading disability
The only other conclusion you can draw is that he is ******* stupid
Now you're limiting yourself. I'll propose other alternatives that perhaps you failed to consider. Here they are in no particular order:
Trump hurriedly jots a few lines down on a note, not paying attention to spelling or grammatical niceities, because he really doesn't care if internet grammer Nazis go nuts or not. He knows what they mean.
On the way to the event, Trump tells an intern to jot down a few notes, again not caring in the least about spelling or grammatical niceities, because again, he knows what they mean and doesn't care what internet grammer Nazis think.
I know you're smarter than to think yours are the only possible conclusions.