Background: Hubert Horatio Humphrey Jr. (May 27, 1911 - January 13, 1978) was an American politician who served as the 38th Vice President of the United States from 1965 to 1969. He twice served in the United States Senate, representing Minnesota from 1949 to 1964 and 1971 to 1978. He was the Democratic Party's nominee in the 1968 presidential election, losing to Republican nominee Richard Nixon.
Context: On April 22, 1974, Humphrey said that he would not enter the upcoming Democratic presidential primary for the 1976 Presidential election. Humphrey said at the time that he was urging fellow Senator and Minnesotan Walter Mondale to run, despite believing that Ted Kennedy would enter the race as well. Leading up to the election cycle, Humphrey also said, "Here's a time in my life when I appear to have more support than at any other time in my life. But it's too financially, politically, and physically debilitating - and I'm just not going to do it." In December 1975, a Gallup poll was released showing Humphrey and Ronald Reagan as the leading Democratic and Republican candidates for the following year's presidential election. On April 12, 1976, Chairman of the New Jersey Democratic Party State Senator James P. Dugan said the selecting of a majority of delegates that were uncommitted to a candidate could be interpreted as a victory for Humphrey, who had indicated his availability as a presidential candidate for the convention. Humphrey announced his choice to not enter the New Jersey primary nor authorize any committees to work in favor of him during an April 29, 1976 appearance in the Senate Caucus Room. At the conclusion of the Democratic primary process that year, even with Jimmy Carter having the requisite number of delegates needed to secure his nomination, many still wanted Humphrey to announce his availability for a draft. However, he did not do so, and Carter easily secured the nomination on the first round of balloting. Humphrey had learned that he had terminal cancer, prompting him to sit the race out. Humphrey attended the November 17, 1976 meeting between President-elect Carter and Democratic congressional leaders in which Carter sought out support for a proposal to have the president's power to reorganize the government reinstated with potential to be vetoed by Congress.
Question: Who was Humphrey's running mate?. Whats the answer?
at the time that he was urging fellow Senator and Minnesotan Walter Mondale to run,