Mitt Romney - that rare political breed, a Republican elected statewide in Massachusetts - told supporters yesterday that if Scott Brown can pull off a similar feat next month in the US Senate special election, it “would shock the country and send a strong message that business as usual in Washington is coming to an end.’’ “He would bring badly-needed fiscal restraint to an out-of-control budget process that is adding trillions of dollars to our national debt,’’ said Romney, the former Bay State governor who gives every indication he’s preparing a second presidential bid in 2012.