Republican Gov. Doug Ducey has publicly declared his neutrality in Arizona's GOP primary for the Senate seat being vacated by Jeff Flake.

"I'm not going to get involved in politics," the governor told me last month. "I'm going to focus on my day job."

So what was Ducey doing at Tucson Congresswoman Martha McSally's big money fund-raiser two weeks ago?

Former Utah Congressman Jason Chaffetz was a special guest at the event. Chaffetz tweeted this picture with Ducey:

How do we know that was taken at the Scottsdale Air Park hangar where the event was held?

Contrast and compare the shot of the white-shirt & navy-suited twins with this image of the event from McSally's Facebook page.

Chairs, heaters, walls, even the American and Arizona flags line up. There's a guy in the front row who might be Ducey or Chaffetz.

The McSally venue is owned by a major Ducey supporter, Randy Kendrick, and husband Ken Kendrick, owner of the Arizona Diamondbacks.

All this might come as a blow to former sheriff and now Senate candidate Joe Arpaio, who can rightly claim that his endorsement helped propel Ducey to victory in the 2014 primary for governor.

Ducey has described Arpaio as "a friend" and a "living legend."

Maybe not in the GOP primary.

Not that any of this is a surprise. Ducey's an establishment Republican going with an establishment candidate in McSally, despite all her Trump hugging.

The third GOP contender, former state legislator Kelli Ward of Lake Havasu City, appeared to get a brush-back from Ducey last month. He called out politicians who were lobbying to be appointed to the Senate seat held by John McCain.

The governor's spokesman referred questions about the McSally event to Ducey's campaign.

The campaign didn't respond to text or phone requests for comment.