Beyond Nice Nick's personal triumph, there were two things about yesterday's TV debate that may end up changing British politics forever.
One is the broad church of the liberal centre-left, or Lib-Lab. Gordon Brown's "I agree with Nick" was tactical, but also often true. When he said Nick Clegg supported him on democratising parliament, what that meant was that Labour is running to catch up with the Liberals on constitutional reform. One reason David Cameron came off worse was that, again and again, this was two against one, Lib-Lab scissors on the Con in the middle. Sooner or later, this convergence of the liberal centre-left will prevail. And it will, to coin a phrase, break the mould.