The Bay State race that could capture national attention kicks off today with Republican state Rep. Jeffrey Perry facing Democrat Norfolk District Attorney William Keating in what promises to be a knock-down, drag-out contest for the seat being vacated by U.S. Rep. William Delahunt. A fired-up Perry came out of his corner with fighting words last night. “We’re taking back our government starting right now,” Perry told supporters at Plimouth Plantation, pledging to be a vote against “Obamacare,” to cut federal spending and to halt illegal immigration. The Sandwich representative, who bested former state Treasurer Joe Malone, Cohasset accountant Raymond...