The Romney team today confirmed grass-roots reports that a campaign bus was sabotaged by an unknown vandal over the weekend. The bus, which was being used for campaign events but not transporting Republican presidential candidate Mitt Romney, was parked in Richmond, Va., when the vehicle was tampered with late Saturday night or early Sunday morning. A Romney campaign official told PJM that the alternator belt was cut. Repairs were under way Monday to get the bus back on the road for a voter registration event in Springfield, Va., from 3 p.m. to 7 p.m. at the Springfield Metro Commuter Lot....