Former White House chief strategist Stephen Bannon on Tuesday will reportedly campaign with former Arizona state Sen. Kelli Ward (R), who is running for United States Senate.

The New York Times’s Maggie Haberman reported the news on Twitter Monday, noting that conservative talk radio host Laura Ingraham invited Bannon to the event.

In more senate anti-establishment news, Laura Ingraham invited Bannon to a Kelli Ward campaign event out West and he plans to attend. — Maggie Haberman (@maggieNYT) October 16, 2017

Ward has launched a primary bid against Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style MORE (R-Ariz.). Bannon’s appearance with her on the campaign trail is another iteration in his vow to challenge the Republican establishment in the 2018 midterm elections.

Last weekend, Bannon declared a “season of war” on the GOP establishment.

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Bannon also supported former Alabama Supreme Court Chief Justice Roy Moore, who ultimately defeated Sen. Luther Strange Luther Johnson StrangeSessions hits back at Trump days ahead of Alabama Senate runoff The biggest political upsets of the decade State 'certificate of need' laws need to go MORE (R-Ala.), in a Republican primary runoff last month.

President Trump has not endorsed a candidate in Arizona, but has praised Ward for challenging Flake, slamming the GOP senator as “weak on borders.”

“Great to see that Dr. Kelli Ward is running against Flake Jeff Flake, who is WEAK on borders, crime and a non-factor in Senate. He's toxic!” the president said in August.