This American humorist's "War Prayer", about the Spanish-American War, was published in 1923, after his death
In his poem "The White Man's Burden," published in McClure's Magazine in .... 
A year later, when Roosevelt became president after McKinley was... [DOC] [TLE] Roughing it Out West [PAR] Dec 18, 2015 ... At his peak, he was probably the most popular American celebrity of his time.