In this Oct. 13, 1983 file photo, Presidential hopefuls, Sen. John Glenn, left, former Sen. George McGovern, center, and former Vice-President Walter Mondale, right, pause for photographers after debating the nuclear arms issue at the Kennedy School of Government at Harvard University in Cambridge, Mass.  A family spokesman says, McGovern, the Democrat who lost to President Richard Nixon in 1972 in a historic landslide, has died at the age of 90. (AP Photo/Elise Amendola, File)

Photo by: Elise Amendola

In this Oct. 13, 1983 file photo, Presidential hopefuls, Sen. John Glenn, left, former Sen. George McGovern, center, and former Vice-President Walter Mondale, right, pause for photographers after debating the nuclear arms issue at the Kennedy School of Government at Harvard University in Cambridge, Mass. A family spokesman says, McGovern, the Democrat who lost to President Richard Nixon in 1972 in a historic landslide, has died at the age of 90. (AP Photo/Elise Amendola, File)