John Dickerson has a concise summary of the ongoing war between Rudy Giuliani and Mitt Romney. Here's Dickerson: "Giuliani's essential charge is that Romney changes positions. Romney's is that Giuliani doesn't tell the truth." Sounds right to me! Dickerson also touches on something important in this paragraph:
In this uneven exchange, Giuliani is also hitting on Romney's essential weakness - that he doesn't have core convictions. Romney's punches, even if they land, don't go directly to Giuliani's core vulnerability. Nor do they diminish Giuliani's best attribute - his reputation as a tough leader. As Bill Clinton famously said about George Bush, voters prefer a candidate who is strong and wrong to one who is weak and right.
One of the more fascinating things about Romney's candidacy is that, in the end, Romney's political philosophy is his lack of conviction. Romney appears truly to be a postideological pragmatist interested in turning around troubled enterprises, whether those enterprises are businesses or the federal government. In other words, to Romney, a lack of conviction is a strength - it helps you analyze data and get things done. We're about to find out how many people agree with him about that.