Wallace did not endorse a candidate in the 1952 presidential election, but in the 1956 presidential election he endorsed incumbent Republican President Dwight D. Eisenhower over Democratic nominee Adlai Stevenson. Wallace, who maintained a correspondence with Eisenhower, described Eisenhower as "utterly sincere" in his efforts for peace. Wallace also began a correspondence with Vice President Richard Nixon, but he declined to endorse either Nixon or Democratic nominee John F. Kennedy in the 1960 presidential election. Though Wallace criticized Kennedy's farm policy during the 1960 campaign, Kennedy invited Wallace to his 1961 inauguration, the first presidential inauguration Wallace had attended since 1945. Wallace later wrote Kennedy, "at no time in our history have so many tens of millions of people been so completely enthusiastic about an inaugural address as about yours". In 1962, he delivered a speech commemorating the centennial anniversary of the establishment of the Department of Agriculture. He also began a correspondence with President Lyndon B. Johnson regarding methods to alleviate rural poverty, though privately he criticized Johnson's escalation of American involvement in the Vietnam War. In the 1964 election, Wallace returned to the Democratic fold, supporting Johnson over Republican nominee Barry Goldwater. Due to declining health, he made his last public appearance that year; in one of his last speeches, he stated, "We lost Cuba in 1959 not only because of Castro but also because we failed to understand the needs of the farmer in the back country of Cuba from 1920 onward. ... The common man is on the march, but it is up to the uncommon men of education and insight to lead that march constructively".