The hope of the defense is that there are at least a couple of Dims that have sufficient conscience and respect for the system to vote no on this fiasco.
I doubt they care one whit. There are ZERO honorable democrats. Some might flip for expediency, but all of them are swamp creeatures.
The defense is playing to the public, hoping to win at the November ballot box. The impeachment case is just the current "stage" for conducting the polkitical battle. The DEMs chose this battleground.