Hillary Clinton has moved to the centre in preparation for 2008. It's become a cliché — so self-evidently true that it shows up not merely in editorials but in news articles as well. One of the reasons it's so uncontroversial is that it seems innocuous, even flattering. But, in fact, the "Hillary shifts to the centre" line isn't innocuous at all. It's crucial to the campaign that conservatives will wage against her in coming years. That campaign is likely to revolve around character. In the 1980s, Republicans demonized Democrats as ultra-liberals. But once Bill Clinton moved the party to the...