The claim that Gosar's sister thinks he is psychopathic is true.
I don't like Gosar one bit, but if I saw an ad that featured a politician's siblings in opposition to him, it would have zero influence on me.
My family is very political. Some of my earliest memories are of my father and his mother arguing politics as I crawled around on the carpet.
As a teenager, I made several speeches before the state legislature in opposition to the ERA, in favor of a right-to-work bill, and several other right wing causes.
Most of the members of my family are either far left or far right. There are very few of us in the middle. My parents both served as our state's chairmen of the American Conservative Union. My dad's sister, on the other hand, was a marxist who ran with the Berrigan Brothers, and broke into city halls around the country to burn draft cards with punks half her age. She was once arrested throwing buckets of lamb's blood on the aircraft at Andrews Air Force Base.
She called my dad in the middle of the night to come bail her out of jail and he told her to **** off and then hung up.
I have a brother who was ready to go to war, literally, if Trump lost the 2016 election. He couldn't wait to start shooting blacks, gays, and Mexicans. He scared me so much I almost notified DHS. Fortunately, his wife got him to turn himself in to the VA and get help. He's much more stable now.
Siblings disagree with each other's politics. Making an ad to air those differences carries no weight with me.