Predictions for the post Trump future..
Win or lose, the Republican party is on it's way out. It's all about the numbers, the Democrats have a perpetually growing base, while the base for Republicans are a shrinking demographic.
What I think will inevitably happen, is as Boomer's die off, the Republican party will shrink into irrelevancy. Meanwhile, the Democratic party will collapse under it's own weight, and splinter into a far left and centrist party. Many former Republicans will be rubbing shoulders with former moderate Democrats, and race will cease to become an effective attack strategy when a large proportion of minorities argue against the Cortiz's and other crazies.
On the positive side, this will mean great strides for race relations. The diehard alt-righties will still be a target, but they will simply cease to matter in the great narrative.