WASHINGTON — As former White House strategist Stephen Bannon declares war on the Republican establishment, a faction linked to the Senate GOP leadership is firing back with the kind of charges previously heard from Democrats and Never-Trumpers when Bannon ran Trump’s campaign and sat in the White House.

Namely: that the head of Breitbart News and self-described “economic nationalist” is, in fact, an anti-Semite and a white supremacist.

The charges, leveled by top former aides to Senator Mitch McConnell (R-Ky.), the Senate majority leader, have shocked conservative Jewish backers of Bannon who have robustly defended him in the past when Democrats made the same allegation.

“We defended him aggressively when he faced these accusations from the left, and I’ll defend him when he faces these accusations from the right,” said Matt Brooks, the director of the Republican Jewish Coalition.

The charge blew into the open this week with a salvo on Twitter from the Senate Leadership Fund, helmed by Steve Law, McConnell’s former chief of staff. In one tweet, the fund included a link to a New York Daily News article from 2016 that alleged that Bannon had a history of making anti-Semitic comments.

Meanwhile, Josh Holmes, another former McConnell chief of staff and outspoken critic of Bannon, called Bannon a “white supremacist” in an interview with The Hill.

The attacks came in the context of a primary challenge in Nevada from a Bannon-backed candidate, Danny Tarkanian, to the state’s incumbent Republican senator, Dean Heller. Brooks noted that the RJC’s affiliated PAC will back Heller in 2018 and likely will face off against Tarkanian. “Dean Heller is a perfect example where Bannon and the RJC are on different sides, but I will absolutely defend Bannon — he is not anti-Semitic,” he said.

The Senate Leadership Fund is no outlier: It raised more than $100 million in the last election and McConnell endorsed it. Law also helms Crossroads USA, the massive PAC founded by Karl Rove, formerly a top aide to President George W. Bush.

Holmes, now a PR strategist, was also McConnell’s campaign manager.

“Let’s not act like everybody doesn’t know exactly who Steve Bannon is,” he told the Washington Post this week, noting Bannon’s avowed associations with the alt-right, a loose association of anti-establishment conservatives that includes white supremacists and anti-Semites, as well as robust defenders of Israel.

Morton Klein, the president of the Zionist Organization of America, was furious with the McConnell-backed attacks. “What Mitch McConnell’s people are doing is a disgraceful political act, promoting an ugly lie about someone he disagrees with,” Klein said, adding that the salvos have caused him to lose respect for McConnell. Bannon is scheduled to attend a ZOA fundraising dinner next month.

Rabbi Shmuley Boteach, who ran an unsuccessful 2012 congressional campaign in Bergen County as a Republican, ridiculed the notion that Bannon is anti-Semitic, noting that he has hired Orthodox Jews in top positions at Breitbart.

“It trivializes the term, it makes a mockery of true anti-Semitism,” Boteach said. “It’s not good for Republicans, it’s never good for people to assail each other with ad hominem attacks that are personal.”

Notably, the RJC, the ZOA and the World Values Network, which Boteach founded, all are backed substantively by Sheldon Adelson, the Las Vegas casino magnate and Jewish philanthropist who also has backed Heller. Klein, coincidentally, spoke to JTA just after meeting with Adelson in Las Vegas.

Tensions between the GOP establishment and Bannon always were present. As executive chairman of Breitbart, Bannon favored Trump from the primaries’ outset because he reviled the party’s establishment. They have been simmering since he left the White House in August and returned to Breitbart with a mission of “going to war for Trump against his opponents,” who include mainstream Republicans like Heller and McConnell. Tensions came to a boil when Roy Moore, a handpicked Bannon insurgent, bested the establishment favorite, Senator Luther Strange, in Alabama’s Republican Senate primary.

And when Arizona Senator Jeff Flake announced that he wouldn’t seek re-election, observers noted it was unlikely he would withstand a Bannon-backed challenge.

In Nevada, Arizona’s neighbor, Tarkanian, the son of a legendary university basketball coach and a perennially unsuccessful candidate for public office, has eagerly taken on the Bannon mantle. On October 23, on Twitter, Tarkanian called on Heller to sign the “McConnell replacement pledge,” to remove the Senate leader.

Stephen Bannon campaigns for Republican Senate candidate Roy Moore in Fairhope, Alabama, in September 2017. (Scott Olson/Getty Images)

On October 25 — a day after Flake’s Senate floor retirement speech shocked the party — the Senate Leadership Fund replied to Tarkanian’s tweet. “Here’s another pledge for @DannyTarkanian to sign backing Bannon over ex-wife charges,” it said, and featured a headline from the New York Daily News last year: “Anti-Semitic Trump campaign CEO not a big fan of ‘whiny brat’ Jews, ex-wife says.”

At issue was a sworn affidavit by Bannon’s ex-wife who, in the course of a custody battle, said Bannon objected to allowing his twins to attend a school with Jewish girls. Bannon denied it, although some elements of the incidents she describes have been corroborated by others. “I am proud to stand with my friend Steve Bannon against Heller/McConnell hatchet-man’s smear attacks,” Tarkanian said on Twitter.

If Tarkanian bests Heller in the primary, it likely will set up a rematch of the House seat he failed to win last year. The victor then was Jacky Rosen, the president of a synagogue in the Las Vegas suburbs, who is favored to be the Democratic Senate candidate.

The Senate Leadership Fund did not reply to a query about why it was bringing up Bannon’s alleged anti-Semitism now, and why it hadn’t when he was in government as one of Trump’s most influential aides. McConnell’s office did not reply to the same query.

Speaking on CNN, the PAC’s president, Steve Law, seemed to see the issue as less about Bannon’s suitability as a major force in American politics, and more about the damage he could do to the Republican Party. “Candidates who get wrapped around him will have to answer for his toxic views, things that he said, his associations with the alt-right when Democrats make him the star of their attack ads next fall,” Law said.

The back and forth over whether Bannon is an anti-Semite is not likely to fade. Bannon has promised to run insurgents in seven of the eight states with Senate elections next year and that Republican now hold. And Democrats are eager to associate Bannon and his associations with the alt-right.

In Ohio, incumbent Democratic Senator Sherrod Brown claimed that Bannon is an anti-Semite and a white supremacist. In turn, a Republican rival favored by Bannon, the Jewish state treasurer Josh Mandel, struck back by saying that making such allegations should disqualify Brown.

Brown was asked on CNN whether he agreed with Representative Frederica Wilson (D-Fla.) — the lawmaker involved in a fight with the White House over whether Trump properly honored a black soldier slain in Niger — who said that there were white supremacists in the White House.

Brown agreed and named Bannon as one. He also named Stephen Miller, a senior adviser to Trump, who is Jewish and an architect of the White House’s controversial immigration policies.

Breitbart News — where Bannon once again reigns as CEO — declared that assessment “false” and asked Mandel, the Ohio treasurer who hopes to unseat Brown, for comment.

“When Washington politicians get so terrified of losing their job and their cocktail party invitations, they embarrass themselves like Sherrod Brown did today,” Mandel said. “Career politician Brown’s charges against former White House advisor Steve Bannon and President Trump’s senior policy adviser are desperate, false and beneath the dignity of his office and the people of Ohio and he should apologize.” Mandel linked to the Breitbart story on his Twitter feed.

Brown is not likely to stop calling Bannon out. In August, after Bannon left the White House, Brown said in a tweet that the aide had “has promoted anti-Semitism, racism and misogyny, embracing bigotry and hate speech.”

Mandel, who lost his 2012 bid to unseat Brown, studiously avoided Trump before last year’s election and campaigned, as he has in the past, as a conventional Republican, favoring a robust U.S. posture overseas and fiscal hawkishness. Since the election, he has embraced Trumpism with a vengeance, even embracing alt-right figures like Mike Cernovich and Jack Posobiec.

Mandel attacked the Anti-Defamation League in July, after the Jewish defense group listed Cernovich and Posobiec as members of the “alt-lite,” figures who reject the open racism of some on the alt-right but nonetheless peddle dangerous and false conspiracy theories. Cernovich and Posobiec were both proponents of the Pizzagate conspiracy theory, which led to a shooting attack on a popular Washington D.C. eatery that, the conspiracists falsely claimed, hosted a pedophilia ring led by Hillary Clinton campaigners. This month, the Forward reported, Mandel was the first candidate to accept the endorsement of a PAC launched by Cernovich and Posobiec.

Mandel did not reply to requests for comment.

The Washington Post reported that Bannon’s reaction to the Senate Leadership Fund’s attack on him, citing his ex-wife’s claims, was to laugh out loud. Bannon has said over the years that while he welcomes the resurgence of a nationalist right in Europe and the United States, he recognizes that it attracts racists and anti-Semites, and he aims to push them away from the movement. Breitbart News is robustly pro-Israel and has also decried anti-Semitism on campuses and in Europe.

Bannon also has said, however, that he welcomes attacks on him and those he endorses as racist, because it galvanizes resentful white voters who are fed up with tales of minority disenfranchisement.

Yet Bannon at times appears to bait his opponents into making the charges of racism. He and his proxies have mimicked some of the themes popular among white supremacists and anti-Semites: Breitbart News included for a time a news tag called “black crime.” Bannon refers repeatedly to “globalists” who seek to control the world’s economy, a framing typical of anti-Semitic conspiracy theorists.

Once Bannon assumed control of Trump’s campaign last year, the candidate made the sinister reach of “globalists” and bankers central to his campaign. Milo Yiannopoulos, the far-right provocateur who co-authored a major piece on the alt-right that ran in Breitbart in 2016, vetted the piece before publication with a neo-Nazi and a white supremacist, although it is not known whether Bannon, who was then directing Breitbart, was aware of the outreach.

In its last major ad before the election, the Trump campaign featured audio from the candidate’s jeremiad against globalists, running over unflattering images of Clinton, President Barack Obama — and three Jewish financiers. JTA Wire Service