Clinton, McCain can't win -- or can they?

Why Hillary Clinton and John McCain are winning the presidential buzz sweepstakes. David Shribman, executive editor of the Pittsburgh Post-Gazette, explains:

They're not as unalike as you think. They're not really from the states they represent. They're not really in the mainstream of their own parties. They're not really what they seem to be.

But they are the most intoxicating figures in American politics today -- and together they personify the problems the political establishment has as the 2008 campaign approaches and underline the power the conservative movement possesses.