As much as The South seems to love Trump, they would not sit at home and allow Hillary or Bernie in the White House. They'll be angry at the RNC but they'll vote for its nominee.

You win the Internet!

will be in play. In SC the republican party is stacking the delegates with Cruz supporters. If Trump goes into the convention without enough delegates to win outright, this is the plan B to keep Trump from getting the nomination.

Voters are not happy about their votes getting hijacked. A good portion of them will not vote for Cruz or vote Dem to teach their party a lesson. _sound familiar?

Now if the Democrats can conquer the divide among its own voters and get them to the polls, not only will blues states be a landslide, but red states will be in play. Which can only help the down ticket races. 2020 will be a census year, districts will be redrawn and it would help tremendously if Dems are in control when that happens. There is one supreme court justice to be nominated and approved, not to mention others will be retiring. The dems need 8 more years to straighten out the boosh years and the teabagger damage.

And there will be more than one SC nominee to consider. We got a coupla senior Supremes up there.

and it will last for a few cycles.

Just spit balling, I think they could:

Keep 1/3 of their trump voters on the party ticket this year and moving forward.
Lose 1/3 of their trump voters for the POTUS race.
Lose 1/3 of their trump voters entirely for this election and a few more cycles.

That final third would be a real blow - most elections are closer, and these virulent types have won them a lot of elections.

But, not sure it totally blows the party up. Just takes the air of out if enough to win POTUS this year, make the senate very winnable, chew into, but probably not swing the gerrymandered house, help get some state level offices back into the D fold, probably linger for the mid terms and maybe 2020 ...

Hopefully effect them enough to maybe help with redistricting and try to reset some of these horrifically gamed districts - federal and state.