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An avowed Nazi running as a Republican lost a House race in suburban Chicago on Tuesday.

Arthur Jones, who called the Holocaust "the biggest, blackest lie in history" and described himself as a former leader of the American Nazi Party, lost by a 50-point margin to incumbent Democrat Dan Lipinski.

Jones still managed to get more than 40,000 votes, according to official figures.

The 70-year-old secured the Republican nomination in March, when the party did not bother to put up any other candidate in the heavily-Democratic congressional district.

Jones's primary win was a major embarrassment for party leaders.

They disavowed the retired insurance agent who told CNN earlier this year that the Holocaust was "nothing but an international extortion racket by the Jews."