In Alabama, Indiana, Kentucky, and Tennessee, the governor's veto can be overridden by a simple majority vote, making it virtually useless. In Arkansas, a gubernatorial veto may be overridden by an absolute majority. The governor of North Carolina had no veto power until a 1996 referendum. In 47 of the 50 states, whenever there is a vacancy of one of the state's U.S. Senate seats, that state's governor has the power to appoint someone to fill the vacancy until a special election is held; the governors of Oregon, Alaska, and Wisconsin do not have this power.