FILE - President Jimmy Carter acknowledges the applause of about 1,100 people gathered in the Elk City High School gym for a town meeting in Elk City, Okla., March 24, 1979. (AP Photo, File)

FILE - President Jimmy Carter carries a peanut plant as he follows his wife Rosalynn from the field at their Webster County, Ga., farm on August 19, 1978. (AP Photo/Jim Wells, File)

FILE - Sen. Joe Biden and former President Jimmy Carter are seen at the Democratic National Convention in Denver, Aug. 26, 2008. (AP Photo/Paul Sancya, File)

FILE - Former President Jimmy Carter and President Clinton applaud former first lady Rosalynn Carter as she speaks, after Clinton awarded the couple the Presidential Medal of Freedom, the nation's highest civilian honor, during a ceremony at the Carter Center in Atlanta, Aug. 9, 1999. (AP Photo/John Bazemore, File)

FILE - Democratic presidential nominee Jimmy Carter shakes hands with tourists as he takes an early morning walk down the main street of Plains, Ga., July 30, 1976. (AP Photo/Peter Bregg, File)

FILE - An estimated crowd of 35,000 people gather for a noontime speech by Presidential candidate Jimmy Carter in downtown Philadelphia, Oct. 29, 1976. (AP Photo, File)