Here's the big issue. Republicans are counting on Trump's lawyers to give them a figleaf of respectability in order to justify their decision to acquit, based on a technicality.
Based on what's being said so far, they're rather frantic that they've not been given that. They may well still acquit, but they know it will only kick the consequences down the road. To, say, 2022.
https://www.youtube.com/v/bMklBpJAiaU