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Every time I run into Charlie Cook, one of the veteran political handicappers of Washington, I say to him, "So?" He knows what I'm asking: Will the Republicans win back the House in November? For months now, he has told me -- and plenty of others -- that the House is within the grasp of the GOP, which needs to pick up 39 seats to take control. As the savvy and nonpartisan Cook has explained, when he and the number-crunchers in his shop examine the House races one by one, they have spotted 30 or so contests where the Democrats are likely to lose the seat. These calculations, Cook has said, do not take into account any possible anti-Democratic or anti-incumbent wave. If such a tsunami of voter sentiment is indeed heading toward Capitol Hill, gaining another nine seats is quite...