“Donald Trump would be best for the job,” said the imperial wizard of the Rebel Brigade Knights of the Ku Klux Klan. “The reason a lot of Klan members like Donald Trump is because a lot of what he believes, we believe in.”

Likewise, Trump has the backing not only of the Republican Party but also of the American Freedom Party, a white nationalist organization. “Donald Trump’s campaign may help remind Americans that all genocide, even against white people, is evil,” said Bob Whitaker, who until spring was the American Freedom Party’s presidential candidate, running with the campaign slogan, “Diversity is a code word for white genocide.”

The American Nazi Party’s position is a bit more complicated. Rocky Suhayda, the party chairman, has predicted that Trump will win and that this will provide “a real opportunity for people like white nationalists.” But, apparently worried that Nazi support for Trump might be counterproductive, he denied reports that on his radio show he had actually endorsed Trump.

“Recently, the jews-media gave the Party international coverage over our last ANP radio show, where they ‘claimed’ that I ‘endorsed’ Donald Trump, in another effort to ‘SMEAR’ the man,” Suhayda wrote on the Nazi Party website. “It was a typical kosher BIG LIE, as exposed and explained in Adolf Hitler’s book Mein Kampf — whereas they ‘CLAIM’ that Mr. Evil Nazi (me) has embraced Donald Trump for President, hence Mr. Trump and myself are joined at the hip, being clones of Little Hitlerites.”

So maybe Trump doesn’t have the Nazi endorsement sewn up after all.

He does have the backing of other prominent figures. Among them: Martin Shkreli, who as C.E.O. of Turing Pharmaceuticals raised the price of a lifesaving drug by more than 5,000 percent; Milo Yiannopoulos, recently banned from Twitter for leading internet trolls on a misogynist and racist campaign against Leslie Jones, the comedian and actress; and Alex Jones, the talk show host who has said that the Apollo 11 moon landing was faked and that no children were actually injured in the Sandy Hook school shooting.

The Washington Post published an early non-endorsement editorial, stating that Trump constitutes a “unique and present danger” to America, but Trump has won some publication endorsements — such as one from The Daily Stormer, a white supremacist website, and one from The National Enquirer.