The big news now in a big twist is:
Trump impeachment trial: Senate backs call for documents, witnesses (usatoday.com)
A GoP congresswoman (who voted for impeachment in Congress) with evidence of the details of the trump/McCarthy conversation wants to testify to that and the senate voted 55-45 to allow.
The significance is that it proves that trump knew what was going on with the mob in the Capitol and he did nothing. He knew that Pence was in danger and did nothing. The trump defence lawyer lied when he said that at no point did trump know what was going on in the Capitol. It puts McCarthy square in the middle. He either confirms the conversation which implicates trump, or he lies under oath when someone has evidence. Evidently he told a number of people about his conversation with trump.
This might be the modern day John Dean moment.