Abraham Lincoln II (August 14, 1873 - September 7, 1967), better known as simply Jack, or Jack Lincoln was the grandson of President Abraham Lincoln, son of Robert Todd Lincoln, and the 26th and 28th President of the United States. He was also the 23rd Governor of Illinois, and is the only U.S. president to have served four terms in office, as well as the only president to have served multiple non-consecutive terms.