Is McCain’s national lead a mirage?

Andrew Sullivan, and others, think so.

From the link:

That was my recent take. Chuck Todd maps McCain’s path to victory and his challenges:

Currently polls show McCain either narrowly ahead or even with both Hillary Clinton and Barack Obama. It is impressive considering how poorly the GOP, and specifically the president, are viewed by the public.

But it is a faux lead. If the de facto Democratic nominee is clear within the next 4-6 weeks, that person will see a poll bounce. And according to GOP pollster Steve Lombardo, it could be one heck of a bounce, like post-convention. He anticipates the Democratic candidate will move up 10 points once the primary race is over.