I know I should like Michelle Obama. But . . . I just don’t. I can’t! Because, every time I try, I’m snake-charmed back by the pearlised nail varnish and Mars Attacks! hair of the one, the only, the ultimate power cheerleader: Cindy McCain. It all came to a head the other week when the putative First Fembot bowled through London on her way back to America from Vietnam. (Clearly, heiresses don’t worry about their carbon footprint — just as long as it’s a diamond-studded, snake-skin-heeled stiletto mega-stomp.) With an Air Force One blow-dry and coral-pink lipstick, the former junior...