You may take a look into history and other countries. It has nothing to do with partisanship, and everything with the authoritarian leader and brainwash techniques to keep him in power. North Korea, anyone? Was Fox News taken over somehow (financially, threatened, managers replaced or such) by Trumps or their associates? It’s hard not to notice that the division is being artificially enhanced, divide and conquer, “us vs them”. What would you expect if it’s not a discussion about impeachment, but “it’s the evil others want to impeach our favourite”? Brilliant. It’s not even about convincing somebody to impeach Trump, it’s about convincing to start a discussion. If somebody genuinely doesn’t support the impeachment as it is, at least they are able to have this talk. But if your loved ones are being turned into cult fanatics, the action should be “detoxify”. Spend more time with them without TV, the less exposure to the drug, the better.
R*ussia boasts something like 86% support for Putin (the majority, probably, reluctantly). It’s not a country divided along partisan lines (it’s got multiple parties), but the division is “pro-putin”/”anti-putin”, and, probably, less “pro-putin” and more “anti-opposition” (because all the opposition leaders want is to destroy the country and sell it to America, with the great Putin preventing it). It started with the executive branch taking over the parliament, the media, killing journalists, persecuting the opposition. Taking the media over created an alternative reality, ridiculously grotesque and absurd, destroying critical thinking and creating zombies. It has nothing to do with a person being right-leaning or left-leaning, whatsoever, both are vulnerable. Maybe, it even can be classified as a mental disease of sorts if people are exposed for too long.