Arthur Jones, a Holocaust denier described as a Nazi by the Illinois Republican Party, won the Republican primary on Tuesday in the state’s Third Congressional District, a heavily Democratic district that includes part of Chicago and its suburbs, according to The Associated Press.

Mr. Jones, 70, unsuccessfully sought the nomination five times before, and his victory on Tuesday was a foregone conclusion after the Republican Party failed to draft another candidate to enter the race against him.

“Even if only myself and my wife voted for me, I’d win the primary because the Republican Party screwed up big time,” Mr. Jones said in an interview.

The Illinois Republican Party has sought to distance itself from Mr. Jones in recent weeks, blanketing the district with campaign fliers and robocalls urging voters to “stop Illinois Nazis,” according to a robocall script provided by the party. Mr. Jones said he had received three robocalls himself.