During the 1972 Democratic National Convention in Miami Beach , Florida , George McGovern considered Shriver as a vice presidential candidate , but his campaign was unable to reach Shriver , who was at the time visiting Moscow , Soviet Union . McGovern then selected Thomas Eagleton instead , who later resigned from the Democratic ticket following revelations of past mental health treatments . Shriver then replaced Eagleton on the ticket . The McGovern-Shriver ticket lost to Republican incumbents Richard Nixon and Spiro Agnew
1972 Democratic National Convention
1972 Democratic National Convention
Sargent Shriver