1521: Pope Leo X excommunicates Martin Luther in the papal bull Decet Romanum Pontificem. An earlier papal edict had demanded Luther recant or face excommunication over his written attacks on orthodox Catholic beliefs and his denial of the power of Rome to determine what is right and wrong in matters of faith.
Construction begins on the Brooklyn Bridge, FDR founds the March of Dimes, Apple Computer is incorporated, and Gen. Manuel Noriega surrenders, all on this day.
Obama kicked off his fundraising tour for Senate Democrats on Sunday with a speaking gig in Atlanta, his first of six events for the Democratic Senatorial Campaign Committee this year.