It is fizzling out; a week or so back one of the Dems "aha, gotcha!" witnesses testified that he pressured Trump to tell him whether or not he wanted something in exchange for the military aid, and Trump rather testily told him "No, I don't want anything at all." He tried to do a "takesies backsies" and say that "everyone" knew there was a give/take situation surrounding the aid but he can't link it directly to Trump or anyone close enough to matter to Trump.
What they (the Dems) are going to (try) and do is rattle Trump by picking off, say, Giuliani or someone else very close to him (or several someone elses) to send a signal. "We could've shot
you..." But they're forgetting (as per usual) that Trump doesn't rattle like that. Censure and move on is probably their next step.
And remember: we're not even at the stage where this is an impeachment investigation. The Dems are just trying to collate information to see if they should have a hearing to determine if they should have an impeachment hearing. This is all handwaving, and the only reason anyone should feel compelled to testify is because they're afraid the optics for refusing will be bad. But as I said before, at this stage the Dems could demand
@Null, @HK-47, me, General Grant's Horse and the ghost of George C. Scott testify and if we all wanted to refuse, and then chip in and hire a skywriter to fly over the Capitol building and write LOL GET FUCKED DEMOCRATS, there'd be nothing they could do about it. They are literally doing what mid-sized city cops do to try and pin down a suspect when they have no actual legal recourse, it's following the by-numbers steps. Sigh, cross arms, tell you to come in and answer questions, break out a tape recorder with a theatrical flourish, etc. etc. Fun fact: did you know that if the police ask you to "come in and answer a few questions" you're under no obligation to do so, and if you go, you can get up and walk out?
This is what the Dems are doing right now, and it's going to lead nowhere but a loss of the Senate come 2020. If the democrats think that a blustering, populist Trump who had a mandate and simple majority was capable of ramming through anything and ruining them in the public arena, they haven't even imagined in their worst nightmares what a blustering, populist Trump
who is now a Lame Duck president not interested in being elected backed up by a congress and senate full of republicans whom they tried to have arrested and tarred with monikers like "traitors" and "treasonous" are going to do. It's going to be nuclear war.