Even before the media obsession with Hillary Clinton’s email server put The Worst President Ever™ in the White House, historians were comparing Donald Trump to Caligula, the cruel, depraved Roman emperor who delighted in humiliating others, especially members of the empire’s elite. But seven months into the Trump administration, we can see that this comparison was unfair.

For one thing, Caligula did not, as far as we know, foment ethnic violence within the empire. For another, again as far as we know, Rome’s government continued to function reasonably well despite his antics: Provincial governors continued to maintain order, the army continued to defend the borders, there were no economic crises.

Finally, when his behavior became truly intolerable, Rome’s elite did what the party now controlling Congress seems unable even to contemplate: It found a way to get rid of him.

Anyone with eyes — eyes not glued to Fox News, anyway — has long realized that Trump is utterly incapable, morally and intellectually, of filling the office he holds. But in the past few days things seem to have reached a critical mass.