At the same time it is also very bad to play into their clown circus of shredding the constitution and our form of govt by their despicable corruption. The senate should not even make itself a party to that and call them on their corruption. IOW, if they want to get into the senate trial then leave them only the option of first going to court and make the case for having a constitional basis for impeachment (the senate counsel can make the case for why they do not meet that bar and hence why the senate refuses to proceed on it) As to introducing evidence - that can be done in cases that Barr DOJ prosecutes - where it needs to be presented in order to secure convictions (not expended in defending the presidency) All of this very hypothetical as the House Dems won't (or can't) even hold a vote on having a formal impeachment inquiry - miles and miles away from them bringing anything to the senate