Dana Milbank: America needs you, Mitt Romney

Mitt Romney: Your country needs you.The 2012 Republican presidential nominee has been reluctant to announce a primary challenge to Sen. Orrin G. Hatch of Utah, the longest-serving Republican senator in history. But America needs Romney to step up, to restore dignity to the Senate — and to save the country from the embarrassment Hatch has become.Hatch, long the picture of conservative rectitude, was once a conscientious legislator, even partnering with Ted Kennedy when he thought poor kids