Virginia Gov. Bob McDonnell, a Republican, appeared with Maryland Gov. Martin O'Malley, a Democrat,  together Sunday on CNN's "State of the Union" in their roles as chairmen of their parties' governors associations. (Associated Press)

Virginia Gov. Bob McDonnell, a Republican, appeared with Maryland Gov. Martin O'Malley, a Democrat, together Sunday on CNN's "State of the Union" in their roles as chairmen of their parties' governors associations. (Associated Press)