Twenty-second Amendment to the United States Constitution
The amendment prohibits any individual who has been elected president twice from being elected again. Under the amendment, an individual who fills an unexpired presidential term lasting greater than two years is also prohibited from winning election as president more than once. Scholars debate whether the amendment prohibits affected individuals from succeeding to the presidency under any circumstances or whether it only applies to presidential elections.
George Allen (American politician)
Barred by term limits from seeking reelection to a second term in 1997, he worked in the private sector until the 2000 election in which he ran for the United States Senate, defeating two-term Democratic incumbent Chuck Robb. Allen ran for reelection in the 2006 election, but after a close and controversial race, he was defeated by Democratic former U.S. Secretary of the Navy Jim Webb. When Webb decided to retire, Allen ran for his old seat again in the 2012 election but was defeated again, this time by Democratic former Governor Tim Kaine. Allen now serves on the Reagan Ranch Board of Governors of Young America's Foundation, where he is a Reagan Ranch Presidential Scholar.