As America lurches from sensation to sensation, a new foreign and trade policy in a hundred easy tweets, all served up by its uniquely mercurial supreme commander, serious people are saying “banana republic” in ever louder voices. True or not, large parts of the ruling cabal have started to sound bananas, especially President Donald J. Trump and his personal attorney Rudolph Giuliani. Indeed, the latter’s “Truth isn’t truth” proclamation pretty much sums up the presidency. But i