It's hard to get six siblings to agree on anything.
One minute-long ad, entitled "Paul Gosar Is Not Working for You", starts off routinely, with testimonials slamming Gosar on everything from health care to the environment.
Horrified, seven of his siblings signed an open letter to the Kingman Daily Miner, stating: "It is extremely upsetting to have to call you out on this, Paul, but you've forced our hand with your deceit and anti-Semitic dog whistle". "I bet he'd be researching what is the most insightful water policy to help the environment of Arizona sustain itself and be successful", said another sister, Jennifer. In addition to Grace, David and Jennifer, Gosar's other siblings - Joan, Tim and Gaston - also appear in the ad. Gosar has nine siblings, with three not appearing in the ad.
"It would be hard to see my brother as anything but a racist", Grace Gosar says in another, according to the Phoenix New Times.
Gosar, 59, has represented the 4th District since 2013 and represented the 1st Congressional District for one term before that.
The Republican candidate has previously come under fire for flying to England over the summer to voice support for an extremist anti-Muslim organization. When House Intelligence Committee Chairman Devin Nunes released a memo that he purported would show those officials' clear bias against the President, Gosar claimed the document showed evidence of "treason". He promoted the conspiracy theory that the white supremacists' rally in Charlottesville, Virginia, previous year was a plot by the left financed by Democratic megadonor George Soros, who Gosar said "turned in his own people to the Nazis".
Gosar's family members admit it wasn't easy to speak out.
Whether or not speaking out will make much of a difference is up for debate.
The ad seems like a run-of-the-mill spot, with six Arizonans knocking Gosar's bonafides and calling for voters to support Brill. In 2016, he was re-elected to the job with 71 per cent of the vote. "We had to stand up for our good name". "This is not who we are".
"I think my brother has traded a lot of the values we had at our kitchen table", says Joan Gosar.