All this represents is the fact that the GOP will not win this presidential election. At best, Kasich and Cruz will manage to derail Trump and got one of them on the ballot, but the Trump supporters won't jump to either of them, so the Dem wins. Worse case, the party falls into chaos at the convention, and no matter who gets the nomination, the fractured and segmented GOP won't be able to compete with the Democrats unified behind whichever one gets the nod.
What the really means, though, is that the 2A fight will be front and center. Clinton and her daughter have both made no bones about their intention to (1) bring back the bans and (2) go after the manufacturers, If she pulls this off, and it's looking more and more likely, the NRA is in for a big fight.