Bob Carr was only trying to be helpful. Lately he's been giving the superpower a pep talk. He sees himself in America's corner, the trainer to a great but bloodied boxer, offering urgent words of inspiration, willing the failing fighter to get back in the ring and box on to victory. It had gone down a treat when he used it on other Americans. So when he snagged, at short notice, a brief meeting with Mitt Romney, Carr decided he'd give the same motivational talk to the presumptive Republican nominee for the US presidency.