The Slime and the Compost think there is a there there.
Nanzy knows there is not.
I think they are starting to get behind the scenes pressure from the military who is calling it a coup and they are making threats.
My bet is there will never be an impeachment vote - they merely intend to use the sham “inquiry” as yet another way to sully the president during the upcoming campaign. Star chamber hearings and leaks of false information. (just like what happened with the Mueller investigation)