It should be up to the electors. Perhaps split evenly if it's an even number?
It doesn't work that way. You have to figure out whose electors get chosen.
Also, y'all can make this thread a thousand times, and I'll keep making the same dumb, increasingly out-of-date reference:
Also, my understanding of the law in New Mexico is that in the event of a tie the state's electoral votes are determined by Kevin Costner, and hilarious hijinks ensue as both Presidential candidates attempt to personally woo him for his vote.