It’s become very simple now.
We used to ask if Trump had conspired with a foreign power for his own gain—first as a candidate for president, then more recently, while in office—violating his oath, committing high crimes and misdemeanors, and betraying the national security of the country he is sworn to defend.
Then he voluntarily released a transcript of a phone call that made it clear that he did exactly that, while inexplicably believing it proved the opposite. (Or perhaps not so inexplicably; we’ll let the forensic psychiatrists deal with that.)