Eisenhower didn’t originally want to run for President. He’d been repeatedly urged to by Harry Truman over the previous years, but Harry wanted Ike to be a Democrat, and Ike’s family were dyed-in-the-wool Republicans. At one point, he retorted to Truman that if he was going to run, it would be as a Republican, not a Democrat.
When word of that got out, Henry Cabot Lodge entered Eisenhower’s name on the ballot for the New Hampshire Primary without Ike’s knowledge. Garnering considerable popular support and a number of endorsements in newspaper editorials, Ike did no campaigning, saying only that if he won, he would contest the election. Eisenhower easily emerged victorious, winning 50% of the votes on March 11, 1952. The next day, he announced that he would indeed run, and come November, he was elected the 34th President of the United States. Richard Nixon was his Vice President.