There is no room in this country for hyphenated Americanism. … The one absolutely certain way of bringing this nation to ruin, of preventing all possibility of its continuing to be a nation at all, would be to permit it to become a tangle of squabbling nationalities.

Theodore Roosevelt (1858-1919) American politician, statesman, conservationist, writer, US President (1901-1909)

Speech, Knights of Columbus, New York City (12 Oct 1915)