To each their own if that’s their prerogative.
Most people will understand that the non-Trump candidate will have zero chance to win, and many people will simply do a write in as a form of protest.
Many people will also simply sit at home and not vote. Not surprising.
“Most people will understand that the non-Trump candidate will have zero chance to win, and many people will simply do a write in as a form of protest.”
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So it’s a self-fulfilling prophecy - e.g. Barry Bonds believes “I know I won’t hit a homerun, so I’m not going to try”.