Progress Report on the Presidential Campaigns

With six months left until primary voters go to the polls, Democrats are raising more money than Republicans and seem to like their available options. For Republicans, it's "none of the above." Clinton continues to lead Obama and Edwards, but among Giuliani, McCain, Romney and Thompson, there's no clear front-runner. What's happened to John McCain? Who is Fred Thompson? Is the Iraq war still the defining issue? What about immigration? Will the political center finally make the difference or has the electorate evolved into warring extremes? We look at the candidates in both parties.