While so much attention has been turned to Newt Gingrich’s catastrophically mistaken attack on Mitt Romney’s Bain Capital, free-market capitalism, investment, and profits, a potentially much more significant development occurred in the New Hampshire debate Saturday night. For the first time, Mitt Romney embraced a much bolder tax-reform plan.

Under pressure from a number of supply-side conservatives (including me, and most especially the editorial-page folks at the Wall Street Journal), Romney appears to be listening.

Read my full column here.