Scott wrote above (in a very observant and perceptive post):
[[ Right now only Trump can do that - is showing us how it can be done. He's a megalomaniac...the only kind of person that can overcome the many social and cultural and political advantages enjoyed by the Democrats. National elections like these are easy for Democrats, they are amazingly difficult for Republicans. It takes someone as bold and fearless as Trump to handle that successfully. ALL of the others lose without ever even having a ghost of a chance. Republicans HAVE to have a game changer or they are simply irrelevant. ]]
I agree with everything you wrote in your entire post above.
Trump is simply destroying the other Republicans, even before the primaries begin. He's doing so because he's controlling the campaign, makin' new rules. He's changed the game and the other candidates are losing -- not only because they can't play by Trump's rules -- they can't seem to even figure out what those rules are.
Perhaps that's not in them.
I believe that many, many Americans, not limited to Republicans, are watching and enjoying this.
They're "enjoying" it not because they see Mr. Trump as "presidential", some do, others may not.
They're cheering because they're watching as the status quo and those who represent it get clobbered.
And so am I.
Aside:
In my enjoyment, I realize that as great a campaigner as Mr. Trump is, his personality is probably not going to serve him well as president.
He has a lot o' learnin' to do yet.
He has yet to discover that there's a significant difference between being the head of a giant organization worth billions, from being a servant of the American people and defender of their Constitution.
I'm hoping he will realize the enormity of the difference, and somehow be humbled by it.
Perhaps that's not in Mr. Trump.
If that's the case, although the electin' may come easily for him, what comes afterward may be all hell.