[....] Hannity, Bannon and King are about to learn the same lesson that Jeb Bush, Marco Rubio, Ted Cruz, Hillary Clinton, Jeff Zucker, Mika Brzezinski and I discovered in 2016: With Trump, it is never over. His base will stick with him no matter what — no matter how loudly and how often the other self-styled leaders of that base take to Twitter or talk radio or any other platform to bleat that Trump has betrayed them.

Coulter’s and Hannity’s abandonment of Team Trump — if it really comes to that — won’t impact the trajectory of this presidency. If Trump’s political career is ever brought to an abrupt end, it won’t be because a few right-wing carnival barkers found themselves unable to pressure the president into adopting a policy position — expulsion of the dreamers — that is supported by only 12 percent of Americans.

Since his inauguration, Trump has chained himself to these characters deep inside an ideological cave where two-thirds of the American electorate never venture. That political strategy predictably led to a 34-percent approval rating at the start of this month. Now that the president has managed to go a week without aggressively working to provoke more than 200 million Americans, he will be on the receiving side of talk radio’s wrath. But if these political entertainers really believe that Trump’s political base is going to blow apart over a deal most Americans support, they are as clueless about Trump’s political base as Clinton was.

Trump’s superglue hold over his supporters has flummoxed conservative and liberal commentators alike since he first rode down his golden escalator at Trump Tower in 2015. Others declared his political career “over!” after he insulted, variously [....]