It might seem like family dysfunction or a very bad case of sibling rivalry.

Six of nine brothers and sisters of Representative Paul Gosar, Republican of Arizona, publicly endorsed his Democratic opponent in the midterm elections in videos on Friday, in what one of them said was nothing short of a moral imperative.

The siblings were alarmed at what they saw as the congressman’s increasingly extremist views on immigration, health care and white supremacists, one of them, David Gosar, said on Saturday.

“I’m just hoping either in this election cycle or next, the people get the idea that he’s just not fit for that office and he needs to be removed,” he said.

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