Good stuff on the primaries from George Will:

Money Q:

The wrong question about Obama has been "Where's the beef?" -- "beef" meaning policy substance. Policy papers in profusion can be ginned up by campaign advisers, of whom Obama has plenty. The right question is whether he is a souffle -- pretty and pleasing, but mostly air and apt to collapse if jostled. Presidential politics is an exhausting, hard, occasionally even cruel vetting process -- necessarily so, given the stakes -- and now that he has been bumped hard we shall see if there is steel beneath the sleek gray suit.

And more about the other candidates and the primary process here.