Answer
In 1996, Ben Nelson lost to Chuck Hagel for a U.S. Senate seat. Nelson, a Democrat, was running for his first term in the Senate, while Hagel, a Republican, was seeking his second term. Nelson was a popular figure in Nebraska, but Hagel had the advantage of being an incumbent and had a strong campaign organization. In the end, Hagel won by a narrow margin, 50.5% to 49.5%.