Re: I'm ignorant! But I'm commenting anyway!
Remember that even before the primary campaign starts, the majority of voters have already decided who to vote for: The D or the R. Party loyalties go back generations. They are part of cultural identity, and they are largely unshakable.
That's why a key part of any campaign isn't just to win the undecided voters to your side, it's also to make sure those who already support your party are sufficiently enthused to actually go down to the polling station and do the vote thing.
Plus, as should never be forgotten, Trump actually got fewer votes than Hillary. He won only because of the electoral collage, a system which was established for the sole purpose of ensuring that certain states (ie, mostly southern states with lower population density) would have an influence upon the election disproportionate to their number of voters. He won according to the rules that constitution lays out, but those rules are arcane relics from a time long-past.