Third, the GOP establishment has so far accomplished much more than whatever is supposed to be replacing it. Asked what Trump has achieved, his defenders typically respond that he appointed a Supreme Court justice, passed tax cuts, and got rid of unnecessary regulations. It is easy to imagine Ronald Reagan, George H.W. Bush, George W. Bush, Jeb Bush, Ted Cruz, or Marco Rubio doing those same things. Trump’s achievements reflect GOP priorities going back decades, not anything new to his agenda. America is as entangled abroad as it was at the end of the Obama administration; there is not yet a colossal wall rising on the southern border, let alone one paid for by Mexico; the United States remains in NAFTA; Trump has done nothing to meaningfully improve infrastructure; and he has done nothing notable to help opioid addicts to recover.
Fourth, there is no heir apparent to Trumpism, or even a deep stable of future presidential aspirants like the one that the Tea Party movement provided the GOP.