Ohio Gov. John Kasich’s long-shot presidential candidacy is on the line today as GOP voters go to the polls in a number of critical states, including his own.

While it is virtually impossible for Kasich, who has yet to win a single primary or caucus, to win the 1,237 delegates necessary to snag the GOP nomination by the time the party has its convention in July, he is banking on winning enough delegates to keep frontrunner Donald Trump from clinching it.

If neither Trump or Ted Cruz, the candidate with the second largest number of delegates, has the necessary majority, the nomination could be decided through a brokered convention, in which party elites, most of whom don't favor Trump nor Cruz, could opt for a moderate, compromise candidate, such as Kasich.