Watching David Cameron's speech on BBC News just now, it's pretty clear that he and his team have been studying the Obama campaign. We already knew this, of course. "Vote For Change", the Conservatives' newly-unveiled campaign slogan, was also the campaign slogan of Barack Obama -- but I hadn't expected Cameron to steal so many of Obama's lines in his keynote speech. There was a whole section towards the end in which he talked about "optimism", of what a transformed Britain might look like after five years of Conservative government, that was awfully reminiscent of Obama's emphasis on "hope". He didn't actually use the phrase "yes we can", but he might as well have done. (To read more, click here.)