WASHINGTON (AFP) - Former US senator George McGovern, a liberal icon who vowed to end the Vietnam War but lost a landslide presidential election to Richard Nixon in 1972, died early Sunday at the age of 90. The family said in a statement that the liberal standard-bearer died at about 5:15 am (1015 GMT) at the Dougherty Hospice House in Sioux Falls, South Dakota, surrounded by family and life-long friends. “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,” the statement said. “He continued giving speeches, writing and advising all the way up to and past his 90th birthday, which he celebrated this summer.”