candidate a: has chance to win, supports policy that voter thinks would result in death of spouse within 2 years.
candidate b: has chance to win, supports policy that voter thinks would result in death of spouse within 2 years, but country would be better.
candidate c : has no chance to win, but explicitly does not support policy that voter things would result in death of spouse within 2 years.
your reasoning: everyone owes their vote to candidate b. and if you had the audacity to NOT vote for candidate B, you, not everyone who voted for Candiate A, are responsible for everything candidate A does.
Me: I'm not voting to kill my spouse.