In the course of his presidency, Obama has gone from an almost magical charismatic figure to an ordinary politician. Ordinary. Average.

This week, Iranian-backed Houthi rebels seized control of the Yemeni government, heretofore pro-American. In September, they overran Sanaa, the capital. On Tuesday, they seized the presidential palace. On Thursday, they forced the president to resign.

In the Middle Ages people took potions for their ailments. In the 19th century they took snake oil. Citizens of today's shiny, technological age are too modern for that. They take antioxidants and extract of cactus instead.

You can have the most advanced and efflorescent of cultures. Get your politics wrong, however, and everything stands to be swept away. This is not ancient history. This is Germany 1933... Politics is the moat, the walls, beyond which lie the barbarians. Fail to keep them at bay, and everything burns.

Increasing public safety almost always means restricting liberties.

So a Holocaust-denying, virulently anti-Semitic, aspiring genocidist, on the verge of acquiring weapons of the apocalypse, believes that the end is not only near but nearer than the next American presidential election. (Pity the Democrats. They cannot catch a break.) This kind of man would have, to put it gently, less inhibition about starting Armageddon than a normal person.

Every two years the American politics industry fills the airwaves with the most virulent, scurrilous, wall-to-wall character assassination of nearly every political practitioner in the country - and then declares itself puzzled that America has lost trust in its politicians.