Who can say what Clinton’s effect on the campaign trail really is? However much journalistic critics and Obama supporters cringed at Bill Clinton’s performances, they seemed to help Hillary Clinton in New Hampshire and Nevada.

But those experiences seemed to unleash something more antic and unruly in Clinton’s attacks on Obama and the media, making the Clinton campaign even more about him and less about her. The effect was a bit like a dieter who reads on the Internet that doughnuts are actually good for you.