Romney Tax Cuts Work Only When Mortgage Break Mostly Reduced

Mitt Romney says he can lower income-tax rates by 20 percent without costing the U.S. government revenue and without making the middle class carry a bigger share of the tax load.

He’s right -- assuming that Congress eliminates the most widely used deductions by taxpayers earning more than $100,000 a year, says Harvey Rosen, an economics professor at Princeton University whose study Romney cites as evidence that his plan is viable.