Eh, I actually think the long life of Trumpism is kind of being overplayed.
The truth is, if the 'Trump wing' candidate is some second string Governor or Freedom Caucus member with no personal wealth, they'll be dead by South Carolina due to a lack of funding. Trump didn't just coverage because he was saying outrageous things - he was saying outrageous things _and_ he was Donald Trump.
Now, I think there is a problem if somebody with a real political pedigree manages to find a way to thread the needle between the white nationalists and the rest of the GOP, but the issue is, the white nationalists don't want dog whistles anymore. They want it in black and white and being shouted loudly.
Also, I somehow doubt the Establishment wing will run 11,306 candidates again.
Eh. I don't know if I believe this after Trump's July fundraising numbers.
We saw it on the left with Bernie Sanders (previously unknown and yet outraised Clinton several months), and we've seen it in the past with the loonies that get funded by appealing to the right (Zimmerman immediately comes to mind), and the joke right candidates who ran hopeless campaigns to get book deals. There's money to be made speaking to the fringes of your base. The problem with Trump was, as in most areas, his campaign was incompetent when it came to fundraising for much of the last year.
But combine somebody as bombastic as Trump with a Sanders-esque fundraising apparatus? No doubt they'd raise more than enough for a competent campaign.