DEL. BOBBY ORROCK knows the sting of partisan redrawing of legislative districts. In 1991, when Democrats ruled the Virginia General Assembly, they drew the freshman Republican’s home in Caroline County right out of his district. He had to move to Spotsylvania to run for re-election. That same year, those devious Dems plotted to extend Del. Bill Howell’s Stafford district into eastern Culpeper County. The only way he would be able to reach constituents there was to drive outside his district and cross the Rappahannock River to get to them.