Lindbergh was an outspoken opponent of President [[Franklin D. Roosevelt]], who used the [[Internal Revenue Service]] and the [[FBI]] to spy on him, and refused to allow him to play any role in the war.<ref>Douglas M. Charles, “ Informing FDR: FBI Political Surveillance and the Isolationist-Interventionist Foreign Policy Debate, 1939-1945.” ''Diplomatic History'' 2000 24(2): 211-232; Douglas M. Charles, and John P. Rossi, "FBI Political Surveillance and the Charles Lindbergh Investigation, 1939-1944", ''Historian'' 1997 59(4): 831-847</ref> | Lindbergh was an outspoken opponent of President [[Franklin D. Roosevelt]], who used the [[Internal Revenue Service]] and the [[FBI]] to spy on him, and refused to allow him to play any role in the war.<ref>Douglas M. Charles, “ Informing FDR: FBI Political Surveillance and the Isolationist-Interventionist Foreign Policy Debate, 1939-1945.” ''Diplomatic History'' 2000 24(2): 211-232; Douglas M. Charles, and John P. Rossi, "FBI Political Surveillance and the Charles Lindbergh Investigation, 1939-1944", ''Historian'' 1997 59(4): 831-847</ref> |