Despite the grim picture the mainstream media continue to paint about just about everything -- the insurgent-ridden reconstruction effort in Iraq, the looming Iran threat, the failed Dubai Ports deal, the twin deficits, the president's sagging poll numbers, the Jack Abrahamoff scandal, and on and on -- there's one thing they just can't taint: This U.S. economy remains very healthy. It's always amazing to listen to conventional demand-side economic pundits and mainstream reporters who try as hard as they can to minimize the excellent performance of the American economy ever since lower marginal tax-rate incentives were put into place almost...