May 23, 2006 -- IN my new book ("Can She Be Stopped?"), I suggest that the Republican best suited to the challenge of preventing Hillary Clinton's ascension to the Oval Of fice in 2008 is Rudy Giuliani. A Fox News Opinion Dynamics poll released yesterday offers some strong ballast for the idea: In a head-to-head matchup, Rudy beats Hillary 49 percent to 40 percent, the best showing among all Republican contenders. By contrast, John McCain has a 46-to-42 advantage over Hillary - besting her but not as decisively as Rudy does. Rudy is viewed favorably by 64 percent of those...