INDEPENDENCE – Before April 12, 1945, many young Americans only associated the presidency with Franklin Roosevelt. "More than that," says Kurt Graham, executive director of the Harry Truman Museum & Library in Independence, "he really pioneered the use of radio as a medium to get to the people – the idea of having a warm, familiar voice." Roosevelt died that day in Warm Springs, Georgia, at age 63 – a shock to most U.S. citizens though not to FDR's closest friends and Democratic Party leaders...