Let’s start with what just about everyone already knows — Hillary Clinton is running for the 2008 Democratic nomination and will be the odds-on favorite to win it. From this admittedly distant vantage point, there are only three serious alternatives on the Democratic side, none of which should present her with much difficulty. The first two, John Kerry and Al Gore, are unlikely because they are retreads. Not since the Democrats re-nominated Adlai Stevenson in 1956 has either of our major parties gone back to the same dry well the next time around, a consideration which works against Kerry. In...