“I remember, when I was a child, being taken to the celebrated Barnum’s Circus, which contained an exhibition of freaks and monstrosities, but the exhibit on the program which I most desired to see was the one described as ‘The Boneless Wonder.’ My parents judged that that spectacle would be too revolting and demoralizing for my youthful eyes, and I have waited 50 years to see The Boneless Wonder sitting on the Treasury Bench.” — Winston Churchill in the House of Commons, referring to Prime Minister Ramsay MacDonald, 1931 Donald Trump, whose promises are probably as malleable as his principles,...