The seemingly innocent slogan "America First" goes back deep in U.S. history.  But it began to develop a racist, anti-Semitic, xenophobic, and fascist tone after World War I.  Adopted by the Ku Klux Klan and eugenicists, it was trumpeted before America's entry into World War II by the America First Committee, whose most prominent spokesman, Charles Lindbergh, championed the practices and policies of Nazi Germany.  Even after being alerted to the slogan's unsavory history, Donald Trump has continued to employ it.