Twelve years ago, I delivered one of the keynote addresses on the first night at the Democratic National Convention in New York. It was a stinging rebuke of the administration of George H.W. Bush and a ringing endorsement of Bill Clinton. This summer I'll again be speaking in New York, but it will be to the Republican Convention that renominates George W. Bush. Many have asked how I could have come so far in just over a decade. Frankly, I don't think I've changed much at all. At 72, I don't feel much need to change my opinions. Instead, the...