At the start of the 1948 election cycle, President Truman was down and out in the polls. He was given a big boost after his opponent, Thomas Dewey, turned down an invitation to appear at the National Plowing Match in Dexter, Iowa. Truman would instead go, and would eventually win the state and another term in office. Here's Rod Stanley of the Dexter Museum with the story.
[Photo Credit: Joy Neal Kidney]