George McGovern, a proud liberal who had argued fervently against Vietnam War as a Democratic senator from South Dakota and 1972 candidate for president, McGovern died at 5:15 a.m. Sunday at a Sioux Falls hospice, surrounded by family and lifelong friends, family spokesman Steve Hildebrand told The Associated Press. McGovern was 90.

I had the opportunity to sit down for a radio interview with McGovern nearly 20 years ago in Rapid City. Probably the smartest man I ever got the pleasure to talk to.

McGovern was born in Avon, SD on July 19, 1922 agrew up in Mitchell, where he was a renowned debater. He volunteered for the U.S. Army Air Forces upon the country's entry into World War II and as a B-24 Liberator pilot flew 35 missions over German-occupied Europe. Among the medals awarded him was a Distinguished Flying Cross for making a hazardous emergency landing of his damaged plane and saving his crew. After the war he gained degrees from Dakota Wesleyan University and Northwestern University, culminating in a Ph.D., and was a history professor. He was elected to the U.S. House of Representatives in 1956 and re-elected in 1958. After a failed bid for the U.S. Senate in 1960, he was elected there in 1962.

As a senator, McGovern was an exemplar of modern American liberalism. He became most known for his outspoken opposition to the growing U.S. involvement in the Vietnam War. He staged a brief nomination run in the 1968 presidential election as a stand-in for the assassinated Robert F. Kennedy. The subsequent McGovern–Fraser Commission fundamentally altered the Democratic presidential nominating process, by greatly increasing the number of caucuses and primaries and reducing the influence of party insiders. The McGovern–Hatfield Amendment sought to end the Vietnam War by legislative means but was defeated in 1970 and 1971. McGovern's long-shot, grassroots-based 1972 presidential campaign found triumph in gaining the Democratic nomination but left the party badly split ideologically, and the failed vice-presidential pick of Thomas Eagleton undermined McGovern's credibility. In the general election McGovern lost to incumbent Richard Nixon in one of the biggest landslides in American history. Re-elected Senator in 1968 and 1974, McGovern was defeated in a bid for a fourth term in 1980.

Throughout his career, McGovern was involved in issues related to agriculture, food, nutrition, and hunger. As the first director of the Food for Peace program in 1961, McGovern oversaw the distribution of U.S. surpluses to the needy abroad and was instrumental in the creation of the United Nations-based World Food Programme. As sole chair of the Senate Select Committee on Nutrition and Human Needs during 1968–1977, McGovern publicized the problem of hunger within the United States and issued the "McGovern Report" that led to a new set of nutritional guidelines for Americans. McGovern later served as U.S. Ambassador to the United Nations Agencies for Food and Agriculture from 1998–2001 and was appointed the first UN Global Ambassador on World Hunger by the World Food Programme in 2001. The McGovern-Dole International Food for Education and Child Nutrition Program has provided school meals for millions of children in dozens of countries since 2000 and resulted in McGovern being named World Food Prize co‑laureate in 2008.

McGovern once famously said "For many years, I wanted to run for the presidency in the worst possible way -- and last year, I sure did," he told a formal press dinner in Washington in 1973.

After losing his bid for a fourth Senate term in the 1980 Republican landslide that made Ronald Reagan president, McGovern went on to teach and lecture at universities, and found a liberal political action committee. He made a long-shot bid in the 1984 presidential race with a call to end U.S. military involvement in Lebanon and Central America and open arms talks with the Soviets. Former Vice President Walter Mondale won the Democratic nomination and went on to lose to President Ronald Reagan by an even bigger margin in electoral votes than had McGovern to Nixon.

He talked of running a final time for president in 1992, but decided it was time for somebody younger and with fewer political scars.

After his career in office ended, McGovern served as U.S. ambassador to the Rome-based United Nation's food agencies from 1998 to 2001 and spent his later years working to feed needy children around the world. He and former Republican Sen. Bob Dole collaborated to create an international food for education and child nutrition program, for which they shared the 2008 World Food Prize.

"We are blessed to know that our father lived a long, successful and productive life advocating for the hungry, being a progressive voice for millions and fighting for peace. He continued giving speeches, writing and advising all the way up to and past his 90th birthday, which he celebrated this summer," the family said in the statement.

Hildebrand said funeral services were to be held in Sioux Falls and details would be announced.

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