As businessman Herman Cain surges atop state and national polls and becomes a top-tier presidential contender, his signature "9-9-9" plan, which calls for a nine percent tax on income, a nine percent national sales tax, and a nine percent corporate income tax, has come under scrutiny from the right and the left. Famed supply-side economist Art Laffer told HUMAN EVENTS that Cain's "9-9-9" plan was a pro-growth plan that would create the proper conditions for America's economy to grow and thrive again. "Herman Cain’s 9-9-9 plan would be a vast improvement over the current tax system and a boon to...