Hearsay is not allowed in courts, why is it allowed here?
Because it’s all they have. They want to impeach Trump over RUMORS spread by proven anti-Trump Rat operatives in the deep state.
This is a purely political process and its played under Calvinball Rules.
Here is 'Kanga':
Zand here is 'Roo':
Or maybe they are just jesters in the kangaroo court that is this trial.
The one that would theoretically be most applicable here is an "admission against interest", where you are seeking to introduce an out of court statement made by someone that makes themselves look bad. The problem is that would really be applicable only to out of court statements made by Trump himself, and that doesn't appear to be relevant here.
“why is it allowed here?”
Federal Rules of Evidence do not apply.
They house can make up any rules they please as long as they can get 218 votes with them.
There is absolutely no authority over them. None.
What a putz.
Even the witnesses looked confused when he said it