By issuing a pair of vetoes Thursday, Virginia Gov. Ralph Northam sent a message to the Legislature and beyond that he is intent on sticking with an aggressive carbon-cutting agenda.One bill he struck down, HB 2611, would have prohibited Virginia from entering a regional program to reduce greenhouse gas pollution from power plants unless authorized by two-thirds of the General Assembly.The other, HB 2269, would have prevented the state from joining a separate regional compact designed to slice emissions from vehicles and other transportation sources unless approved by two-thirds of the General Assembly.