'America's mayor' in strong position for '08 With the 2008 race off to a fast start, there have already been some big surprises (Obama, anyone?). But the biggest shocker so far has to be how strong "America's mayor" is running in the polls. The most recent poll has Giuliani leading the Republican field by five points (with 31 percent to John McCain's 26 percent, according to Real Clear Politics). True, it's early. But the numbers do reflect a deep reservoir of support among some GOP primary voters. Giuliani has a few things going in his favor. For starters, he has...