I know it would take a 2/3rds majority vote in the Senate to convict Donald Trump in his second impeachment trial. But what if a substantial number of Senators boycotted the trial, and declined to vote at all? Would it just take 2/3rds of the actual voting Sentators to convict? Or is it the absolute number of yes votes that makes the difference?
Would it change things at all if the Senator was present, and voted "present" instead of casting a vote one way or another for conviction?