Let's see, that last king we had was King George the Third who ruled until we threw his troops out and formed our own nation and Constitutional Republic.
Joshua Abraham Norton, born in 1818 called himself Emperor of the United States and Protector of Mexico. He was mentally-ill, but even upper-crust society humored him and called him Emperor. Since he had no power and all said his rule was benign, no one stopped him from his proclamations.
So far, every "president" we have had, with the exception of those that had to assume the office due to the expiration of a sitting president, were duly elected, either by a majority of voters or by the Electoral College, or both. In this most recent election, the candidate that got not only the Electoral College, but also the "majority of votes," was a guy named Donald J. Trump, through that very Democratic process the left claims to want to preserve.
All I've seen from the Democrats, Socialists and Communists, is the protesting, chanting and violence, AGAINST the will of the voters and Electoral College. This displays to me, a disdain and outright hatred for the "Democratic" process that occurred and a preference for a one-party only authoritarian/tyrannical government instead. Clearly, hypocritical.