Have you noticed that, while united on the desire to impeach, Democrats have changed the grounds for that impeachment several times? Shouldn't that ring an alarm bell that they don't really care about "high crimes and misdemeanors" and are putting the cart before the horse?
First it was about "colluding" with the Russians to meddle in the election. Problem was that nobody knew precisely what constituted “collusion,” which didn’t stop them from spending 2+ years and $320 million trying to prove that he did it, whatever it was, and even with an such an undefined crime they failed to get an indictment.
Then it was about "obstruction of justice," except that no one could be convinced that what he was doing amounted to “obstruction.” Further, with no underlying crime it turned out that what he wasn’t obstructing wasn’t actually justice, so that amounted to another failure.
Next they moved from Russia to Ukraine and changed the charge to a "quid pro quo" until it turned out that voters couldn't speak Latin. In any case the Ukrainian president said there wasn’t a “quid pro quo,” whatever that is, so Democrats were foiled again.
Now they have switched the charge to "bribery," not because Trump did it, or because they have any evidence of such a deed, but because (unlike “collusion, obstruction of justice” or “quid pro quo”) that crime is specifically stated in the constitution as grounds for impeachment. Clever.
In the normal course of events this process would go something like, "Hey the president bribed somebody so we need to impeach him." Instead the drivers of the process are saying that, "We want to impeach the president, so we need to find a crime to use." Awesome.
Democrats are really enamored of their impeachment cart, they just don’t know where to put the horse, assuming that they would recognize a horse if it walked up and bit them on the collective ass.