At one point, Santorum emphasised how important it was "that we win the House back and that we take the United States Senate", omitting the number one aspiration of Republicans across America - taking back the White House from Obama. Santorum probably hasn't damaged Romney with his graceless speech today - but he has damaged himself. Having run a highly commendable race on a shoestring, he had an opportunity to lift himself straight away into the top ranks of his party's leadership with real prospects of victory in 2016 (if Romney loses in November) or even 2020. But by making...