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Although polls show that the tax measure nearing the finish line in Congress is unpopular, Senate Majority Leader Mitch McConnell, R-Ky., predicted Sunday that it will ultimately prove a political winner. By next fall, he predicted, Americans will already be feeling the effects of the revisions in the tax code, a version of which passed the Senate early Saturday. Senate approval has moved President Donald Trump and the Republicans who control both houses of Congress close to being able to claim their first major legislative achievement of an era in which they control both ends of Pennsylvania Avenue. Is this tax bill the one piece of legislation that will catapult the GOP in midterm elections?