If the governor dies, resigns or is impeached, the lieutenant governor becomes governor for the rest of the term. If the governor becomes unable to act as governor because of disability, the lieutenant governor only acts out the duties of governor. Should both offices be vacant, the president "pro tempore" of the state senate becomes governor. The position of lieutenant governor was created in the 1874 constitution. Before this, the speaker of the senate would act as governor in cases of vacancy. At first, the lieutenant governor could only act as governor. It was not until the 1968 constitution that the lieutenant governor could actually become governor. The office of governor has been vacant for an extended period of time once. There was a 17-day time period in 1848 between the death of Francis R. Shunk and the swearing in of William F. Johnston. Governors and lieutenant governors are elected on the same ticket.