Presidential campaign, 1952

President Harry S. Truman flips a fake power switch for the Hungry Horse dam in Kalispell, Montana. President Truman made a public address there while on a campaign trip through the western United States. Also pictured: Secretary of the Interior Oscar Chapman (center). Man on right is unidentified.

President Harry S. Truman (fourth from left) and others tour the Hungry Horse Dam outside Kalispell, Montana. Also pictured: C. H. Spencer, Hungry Horse Dam construction engineer (third from left); Ohio Congressman Michael J. Kirwan (foreground, right); and Montana Congressman Mike Mansfield (behind Congressman Kirwan). All others unidentified.

Secretary of the Interior Oscar Chapman (center) meets with representatives of labor organizations during a trip to Indiana. Also pictured: Harlan J. Noel, CIO-PAC state director of Indiana. Man in back is unidentified.

President Harry S. Truman (left) gives a public address from the rear platform of his train during a stop in Columbia Falls, Montana while on a campaign trip through the western United States. Congressman Mike Mansfield is pictured in center. Man at right is unidentified.

President Harry S. Truman (left) and Congressman Mike Mansfield on the rear platform of the President's train after it arrived in Columbia Falls, Montana. President Truman was on a railroad campaign trip through the western United States.

Secretary of the Interior Oscar Chapman (center) meets with Lieutenant Governor of Indiana John A. Watkins (left) and Democratic National Committeewoman Inez Scholl during the 1952 campaign.

Secretary of the Interior Oscar Chapman (seated, second from right) talks with labor leaders during the 1952 campaign. All others are unidentified.

Left to right: C. H. Spencer, Hungry Horse Dam construction engineer; Margaret Truman; President Harry S. Truman; and Congressman Mike Mansfield at the Hungry Horse Dam project outside Kalispell, Montana during a stop on President Truman's Western campaign trip.

Left to right: C. H. Spencer, Hungry Horse Dam construction engineer; President Harry S. Truman; and Ohio Congressman Michael J. Kirwan tour the Hungry Horse Dam outside Kalispell, Montana during a stop on President Truman's Western campaign trip. President Truman is holding a hard hat with a "hungry horse" mascot painted on the side and his name on the front.

A crowd of unidentified people gathers at the train depot in Columbia Falls, Montana to hear President Harry S. Truman speak during a stop on his campaign trip through the western United States. Pictured: President Truman (top right corner, underneath second from right window of train car).