Calling someone evil is a moral, maybe even a religious, judgement. Using whatever my ethical standards are, I can categorize people as good or evil and make predictions about how they will act based on those assumptions. But in the realm of politics, does moral uprightness necessarily translate to good governance? I would argue that it is mostly irrelevant. It's also completely subjective.
Morality of politicians is always brought up by their opponents and ignored by their supporters. Donald Trump is arguably the most corrupt, dishonest, and morally bankrupt president that we have ever seen. Do the people who agree with his policies care? Not at all. Even Evangelical Christians, who were very concerned about morality when Bill Clinton was engaged in oral sex in the White House, are some of the biggest Trump cheerleaders. Democrats aren't quite as bad — they'll push out one of their own if certain lines are crossed, but nobody can argue with a straight face that they're all choir boys.
Let's dispense with a literal interpretation of the phrase "lesser of two evils". Sure, an argument can be made that some politicians really are evil, but most of the time the phrase is being used figuratively. What we mean is that Candidate A has fewer positions that we dislike than Candidate B does. My dad had a saying when it came to voting — he'd say that he'd hold his nose and vote for someone who wasn't quite as bad as the other guy. None of them are evil, it's just that none of them are all that good. I'm not using "good" in a moral sense, but in the sense of being counted upon to govern in a way that I consider good for the country and good for me.
The problem with our system of choosing elected officials (one of them, anyway) is that it's a binary choice. We're not legally restricted to two choices, but effectively it's going to be, with few exceptions, either a Democrat or a Republican that gets elected. The system is rigged so thoroughly that most of us are conditioned to view a third party challenger as a spoiler whose only function is to siphon votes away from the two main parties, and a vote for such a candidate is characterize as a "wasted vote". There's solutions to this state of affairs, ranked choice voting being the most radical, with runoffs being an easier to implement alternative. Currently the presence of third party or independent candidates tends to result in someone with only 35-40% of the vote getting elected. Until radical change in how we run elections takes place, we're stuck with the binary.
Since we are faced, in virtually every election, with only two choices, is it reasonable to assume that one of those candidates will perfectly align themself with me on all of the issues that I think are important? Of course not. Will either candidate be perfectly in opposition to all my issues? Also no. So, what do we do, do we stay home, secure in our purity, as our friends and neighbors vote for "evil"? Or do we weigh the pros and cons of each candidate and vote for the one who mostly aligns with our priorities? Of course, many people are one issue voters — they have one priority and will support whoever has that same priority, no matter what else they believe in.
Waiting for that perfect candidate will be a long wait.






