Former Vice President Walter Mondale, who served under Jimmy Carter and was the Democratic nominee for president in 1984, died Monday at age 93.
President Joe Biden, who was mentored by Mondale through the years, said that the former vice president gave him a "roadmap" to successfully take on the job.
Mondale was the first vice president to have an office in the White House and was deeply engaged in both U.S. and foreign policy. He served as Minnesota's U.S. senator from 1964 to 1976 and was also former President Bill Clinton's ambassador to Japan.
Mondale also nominated the first female nominee for vice president of any major American party, naming New York congresswoman Geraldine Ferraro as his running mate in his 1984 presidential run.
Mondale was awarded the Public Leadership in Neurology Award in 2015 for raising awareness for brain health after losing his wife and daughter to brain diseases.
On Sunday, Mondale spoke on the phone with Biden and former Presidents Carter and Clinton. According to his friend and former campaign staffer Tom Cosgrove, Mondale "perked up" after those calls.
The former vice president wrote a goodbye email to the 320 staffers that spanned over four decades, telling them how much they meant to him. He and Carter were the longest-living post-presidential team in American history.