Now we live in a completely opposite world where the voters except politicians to put loyalty to the party over anything else and actively punish politicians who actually care about principles. The nation being a 46-46 nation also means that politicians generally face more danger to their political careers from angering their base than alienating swing voters meaning they have absolutely 0 incentive to do anything to the contrary, and that is why the GOP hasnt turned on Trump. If the Republican politicians from today were around in 1973 they would have forced Nixon out too, and if the GOP politicians from 1973 were around today they would stand behind Trump as well for the same reason.
Only Republicans feel that way. A Democratic president who did everything Trump did would have virtually no support among Democratic politicians or Democratic voters. The Ukraine scandal would have been a near-unanimous removal, much less the Coupitol.