Overally, vanishingly unlikely.
A Trump win in the face of Dem gains elsewhere is plausible (if he remains functional, something I doubt). Even in such circumstances, Trump has shown no ability to "triangulate" as you suggest.
I'd argue that he has, on guns if nothing else. And pre-2000s Trump was a Democrat, and is on record supporting things like infrastructure spending and universal health care.
The GOP is already adjusting to its new role as the Party Of Stimulus.
CALLER: In 2019, there's gonna be a $1 trillion deficit. Trump doesn't really care about that. He's not really a fiscal conservative. We have to acknowledge that Trump has been cruelly used.
LIMBAUGH: Nobody is a fiscal conservative anymore. All this talk about concern for the deficit and the budget has been bogus for as long as it's been around.
https://www.cnn.com/2019/07/17/politics/rush-limbaugh-debt-trump/index.htmlHis ego is too huge, and his actual negotiating skills are non-existent.
The fact that his ego is yuge is precisely the kind of thing that could hook him into a system of Keynesian makework projects, particularly in the face of a potential recession in his second term, if he gets something like a Trump National Airport out of the bargain.
Democrats will not make concessions to Trump's ego necessary to get anything other than keeping the nation's lights on.
They would if it kept them popular in their home districts, which is all that really matters.
Pence wins no future elections, save the outside chance that he is a late replacement for a too-ill-to-run Trump in 2020 and then wins a close election.
This depends on whether or not he can hook his Reaganoid policies into a reactionary Keynesian framework - in other words, if Trump's second term proceeds anything like I've suggested, I'd say this follows rather logically, at least as logically as the 'Eastern Establishment' Bush
pere succeeding Ronald Reagan did.
A Progressive landslide is coming, but the Yang-inspired politics honestly seem more likely to find a home in a re-invented Republican party (or a replacement for it) around the mid-2030s.
Doubtful. "Free money" is at the heart of everything the GOP loathes. They're far more likely to acclimate themselves to Keynesian indirect stimulus projects, which at least have tangible and immediate results.
The Democratic party itself is going to face an internal struggle between progressives and pro-corporate neoliberals.
And some kind of Yangism is probably an ideal synthesis for them to smooth over this contradiction.