Trump is the elected president of USA, one of the most important country on Earth. The fact that you suggest a private company should police his speak is insane to me.
What Twitter can do is decide they don't want Trump to be an active member of their community. That is not just within their legal rights; it's well within their moral rights too.
What about the account of Barack Obama, who supported extra-judicial drone killings of US citizens?
https://www.vox.com/policy-and-politics/2016/11/14/13577464/...
Still, a private company can do whatever it wants.
Fact is, regardless, Twitter will never censor Trump or it’ll be the end of Twitter.
But still, it’s a private company that’s not FCC regulated (yet).
Fun aside, as being forced to house soldiers on your property is enumerated as forbidden, and that the president is the commander in chief, does that mean Twitter could kick him out based on that?
If you want to take it literally, USA is not Trump's property.
The President is a person, not a god. If they want to use a private platform to speak, then they have to accept that platform's rules, just like anyone else. If they don't like that platform's policy, then they can use any other platform in the world.
A private company cannot and should not police the President’s speech.
However, it can and should (insofar as it does for other users) police the President’s use of that company’s platform for speech.
The alternative is systematically favoring the government against opponents in a way which makes Twitter a de facto government propaganda arm.
The fact Twitter (and a lot of other companies running community/social media sites nowadays) don't seem to have the guts to do this shows how bad they are at enforcing their own 'guidelines'.
But yeah, if Trump joined a service I was in charge of and broke the rules, he'd get punished like any other user would for doing the same thing.