The Anti-Defamation League is asking Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE to speak out against anti-Semitism on the part of his supporters after he tweeted a photo of Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE with the Star of David superimposed on it.

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The image shared by Trump on Saturday — reportedly created by white supremacists — accused Hillary Clinton of being "corrupt" and had a six-pointed star emblazoned across it.

"We've been troubled by the anti-Semites and racists during this political season, and we've seen a number of so-called Trump supporters peddling some of the worst stereotypes all through this year," wrote Jonathan Greenblatt, CEO and national director of the Anti-Defamation League, in a statement.

"And it's been concerning that [Donald Trump] hasn't spoken our forcefully against these people. It is outrageous to think that the candidate is sourcing material from some of the worst elements in our society."

The image appeared on an internet message board for the alt-right, a digital movement of neo-Nazis, anti-Semites and white supremacists that has shown interest in Trump's candidacy, Mic reported on Sunday.

The image was featured on the message board as early as June 22 — more than a week before it was tweeted by Trump, according to the news outlet.

The tweet drew quick backlash from people asking why the Star of David was used.

Two hours after the initial post, Trump tweeted a different version of the same image, using a circle instead of a star. He then deleted the original post. But he hasn't publicly apologized for or acknowledged the incident. And a former aid to the campaign, Corey Lewandowski, dismissed the controversy as "political correctness run amok."

"For those people who say that you can write this off, and that calling it out is simply political correctness, it's crazy," Greenblatt wrote.

"We would like to see [Trump] speak out consistently and clearly and reject not only this kind of prejudice, but the people behind it. And make it clear that they have no please in the public conversation, and no place in a political campaign, and that they have nothing to do with making America great again."