The only way to fix this is to change the system. Give voters papers where they can fill in priorities, with priority one two three etc. The system is called STV: https://en.wikipedia.org/wiki/.... The voters then will be free to support any candidate they want, regardless of strategy.
From Jill Steins Campaign Page...
Abolish the Electoral College and directly elect the President using a national popular vote with ranked-choice voting..
Eliminate “winner take all / first past the post” elections in which the “winner” may not have the support of most of the voters. Replace that system with ranked choice voting and proportional representation.