I've been seeing a lot of people talk about how the impeachment of Donald Trump is a waste of time and money. I've long heard people say it would never work, and it appears they are correct... in a way. However, I think this impeachment has done exactly what it was supposed to do.
The Democratic leadership didn't pursue impeachment for many previous offenses, even as many Democrats called for them to do so. The reason is they never expected Donald Trump to be ousted by any impeachment trial. The purpose of this impeachment trial was to make a case for the public to see how craven the Republican defenders of Donald Trump are. This was ultimately just a way of saying, "We (probably) can't stop Trump because his sycophants are in control. If you vote for them again, this is what you'll get."
Republican defenders of Trump don't want to see evidence. They don't want to hear from witnesses. They don't want to have any discussion of Trump's behavior at all. They will do practically everything in their power to stop any examination of Trump's behavior because their view is Donald Trump is their party, therefore no opposition to him can be tolerated. Note, I said he *is* their party, not he is *of* their party.
You cannot be a Republican and oppose Trump in any meaningful way, You will be driven out of the party. Many people already have been. That level of willful polarization in the party is a depressing state of affairs, but it is also the best state of affairs Democrats could hope for. Their message is becoming, "If you think it is bad to have a king as president, with no checks on his power, don't vote Republican."
I wouldn't care to predict if this approach will pay dividends in terms of election results, but it has certainly worked in terms of messaging. I'd wager almost nobody believes Trump and his supporters are acting with any integrity at this point. Even the people who defend him largely recognize it's purely for partisan reasons. Ask some of them, and they'll all say basically the same thing, "It's 'us' versus 'them,' and any member of 'us' is better than 'them.'"