George Stanley McGovern, D-S.D., a longtime prominent liberal senator from South Dakota, died Sunday morning surrounded by his family and friends, CNN reports. McGovern was also the Democratic presidential nominee in 1972 who lost to Richard Nixon. McGovern was 90 years old.

"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," his family said in a statement, according to the Associated Press.

U.S. Sen. Amy Klobuchar issued the following statement regarding McGovern's passing:

"George McGovern will be remembered for his strong voice and courage to take a stand on the major issues of his time. A veteran who conquered his fear of flying to defend his country during World War II, Senator McGovern dedicated his life to serving the nation he loved. Growing up in neighboring South Dakota, he was instilled with the midwestern values of decency, fairness and tolerance which guided him throughout his career. He will be missed by our nation."

Last week, McGovern's daughter said her father was "nearing the end" and he was admitted to the Dougherty Hospice House in Sioux Falls.

The South Dakota native and World War II veteran served his state in Congress for more than two decades years, first as a member in the House of Representatives and then in the Senate, Politico reports.