Currently there are people making the case that Trump's tweets regarding North Korea constitution ToS violations that would justify suspensions/bans if they were posted by anyone else.
Pic related is the section that people are arguing Trump has been violating. Seems pretty cut-and-dry to me, but more importantly, these threats are actually legitimate ones that could be considered imminent. Most people don't actually have the power to kill millions of people via nuclear war, but Trump does theoretically.
How long is twitter going to sit back and let these ToS violations continue?