Norman Mattoon Thomas (Nov. 20, 1884-Dec. 19, 1968) - some of us are old enough to remember him running for President - was a leading American socialist, pacifist and six time presidential candidate for the Socialist Party of America.
Norman Thomas said this in a 1944 speech:
"The American people will never knowingly adopt socialism. But, under the name of "Liberalism", they will adopt every fragment of the socialist program, until one day America will be a socialist nation, without knowing how it happened." He went on to say: "I no longer need to run as a Presidential Candidate for the Socialist Party. The Democratic Party has adopted our platform."