"Mitt wants to run. He never stopped wanting to run," an anonymous senior adviser of Mitt Romney's 2012 presidential campaign recently told New York magazine. Other members of Romneyworld have denied the former governor is interested in another campaign. But at this stage in the 2016 race, Mitt Romney should start preparing to get back in the arena.Romney should be ready to enter the field to save his party from an awful reckoning between its leadership and its base, a reckoning that has been brought on by Donald Trump's campaign. Trump has proven that the "strongest GOP primary field in...