"There will be a day when you will wish that you had done a little evil to do a greater good."
--Sybilla (Kingdom of Heaven)
The primary heuristic people seem to prefer when voting for president this time around is: vote for the lesser of two evils.
No big deal, some might say, that's how it nearly always is. Few candidates are perfect. Compromise is required.
If that has been the dominant mindset all along, then it should not be a surprise that we are where we are.
When you compromise with evil, you increase evil.