First, the reality TV element in Trump’s campaign is a kind of fun-house-mirror version of the celebrity-saturated Obama effort in 2008. Presidential politics has long had an escalating celebrity component, a cultish side that’s grown ever-more-conspicuous with time. But the first Obama campaign raised the bar. The quasi-religious imagery and rhetoric, the Great Man iconography and pillared sets, the Oprah endorsement and Will.i.am music video and the Hollywood stars pledging allegiance — it was presidential politics as one part Aaron Sorkin-scripted liturgy, one part prestige movie’s Oscar campaign.

And it worked. But because it worked, now we have the nearly-inevitable next step: presidential politics as a season of “Survivor” or, well, “The Apprentice,” with the same celebrity factor as Obama’s ’08 run, but with his campaign’s high-middlebrow pretensions stripped away. If Obama proved that you can run a presidential campaign as an aspirational cult of personality, in which a Sarah Silverman endorsement counts for as much as a governor or congressman’s support, Trump is proving that you don’t need Silverman to shout “the Aristocrats!” and have people eat it up.

He’s also proving, in his bullying, overpromising style, that voters are increasingly habituated to the idea of an ever more imperial presidency — which is also a trend that Obama’s choices have accelerated. Having once campaigned against his predecessor’s power grabs, the current president has expanded executive authority along almost every dimension: launching wars without congressional approval, claiming the power to assassinate American citizens, and using every available end-around to make domestic policy without any support from Congress.

In the process, he’s cut the legs from under principled liberal critiques of executive power, and weakened the American left’s role as a bulwark against Caesarism.