Associated Press

President Harry S. Truman addresses an estimated crowd of 75,000 people in Dexter, Iowa during an appearance at the National Plowing Match as part of the 1948 presidential campaign. All others are unidentified. From the campaign scrapbook of Harry S. Truman.

Five-year-old Kathleen Meldrem presents an ear of corn to President Harry S. Truman while he was en route to Dexter, Iowa during the 1948 presidential campaign. from the campaign scrapbook of Harry S. Truman.

President Harry S. Truman and family wave to supporters from the rear of the presidential train in Des Moines, Iowa during the 1948 presidential campaign. From left to right are: Iowa Governor Robert D. Blue, Democratic candidate for Iowa Governor Carrol Switzer, President Harry S. Truman, First Lady Bess Truman, and Margaret Truman. Others in the background are unidentified. From the campaign scrapbook of Harry S. Truman.

President Harry S. Truman is conferring with Iowa Democrats aboard the presidential campaign train in route to Dexter, Iowa. Seated from left to right, are: Colonel B. J. Palmer, President Harry S. Truman, and Hugh Harrison. Back row, from left to right: Guy Gillette, Jim France, Carroll Switzer, Ralph Evans. From the campaign scrapbook of Harry S. Truman.

President Harry S. Truman (center) is shaking hands with the winners of the National Plowing Contest in Dexter, Iowa. On the left is defending champion Ronald H. Orr of Beatrice, Nebraska, and on the right is new champion Charles G. Long of Bethany, Missouri. Others in the background are unidentified. Mr. Truman stopped in Dexter as part of his presidential "whistlestop" campaign. From the campaign scrapbook of Harry S. Truman.

President Harry S. Truman (center) is standing on the rear platform of the Presidential Rail Car with Margaret Truman (right) and Kentucky Senator Alben Barkley (left) as Truman leaves to begin the first leg of his 1948 presidential campaign "whistlestop" tour. From the campaign scrapbook of Harry S. Truman.

President Harry S. Truman eats lunch with farmers in Dexter, Iowa at the National Plowing Contest. President Truman (center) is seated with Howard Walker of Dexter, Iowa (left), and Ralph Mortimer of Dallas Center, Iowa (right). Mr. Truman made a campaign speech at the Plowing Match before sitting down to lunch. From the campaign scrapbook of Harry S. Truman.

President Harry S. Truman greets supporters from the rear of the presidential train in Harrisburg, Pennsylvania during the 1948 presidential campaign. All others are unidentified. from the campaign scrapbook of Harry S. Truman.

President Harry S. Truman hugs a little girl, a poster child for the March of Dimes.

A view of United States Capitol Building during Harry S. Truman's time as a Senator.