If he did I'm unaware of it, and I'd be hard put to explain, if it's the same Henry Wallace, why a lifelong Red would endorse the consummate and preeminent anticommunist politician of his day.
From Wikipedia, FWIW:
In 1950, when North Korea invaded South Korea, Wallace broke with the Progressives and backed the U.S.-led war effort in the Korean War.[5] In 1952, Wallace published Where I Was Wrong, in which he explained that his seemingly-trusting stance toward the Soviet Union and Joseph Stalin stemmed from inadequate information about Stalin's excesses and that he, too, now considered himself an anti-Communist. He wrote various letters to "people who he thought had traduced (maligned) him" and advocated the re-election of President Dwight D. Eisenhower in 1956.[5]In 1961, President-elect John F. Kennedy invited him to his inauguration ceremony, though he had supported Kennedy's opponent Richard Nixon. A touched Wallace wrote to 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."[5]
I learned something, too.