Topic of the Day: Could Hillary snag the nomination?

The New York Sun's editorial page wonders if the forces might be aligning for Hillary to make a run for the Democratic nomination:

What if, by the time the convention rolls around, Mr. Obama isn't just running neck and neck with Mr. McCain but is lagging by, say, five percentage points, or if Mr. Obama makes a big blunder with his choice of a running mate, or some other campaign stumble? Then expect the whispers already swirling among Clinton supporters to turn into a full-fledged roar.

Think it could happen? How damaging would it be to the Democratic party?