If Trump's so innocent: Bring on the witnesses! (Absurd the idea of having a trial without witnesses is up for debate at all)

IF TRUMP’S SO INNOCENT AS YOU SAY: YOU SHOULD HAVE NO PROBLEM BRINGING ON ALL THE WITNESSES! INCLUDING TRUMP HIMSELF; SIDENOTE: IT’S ABSURD HOW WE’RE DEBATING THE NOTION OF AN IMPEACHMENT TRIAL WITHOUT ANY WITNESSES AT ALL