"These disgruntled Hillary suppporters (sic) are related by blood to me but like leftists everywhere, they put political ideology before family".
"Stalin would be proud", he added.
Paul Gosar, a four-term congressman who represents the Fourth Congressional District, noted that all of his siblings live outside Arizona.
David Brill David Gosar brother of Rep. Paul Gosar, says his sibling"doesn't appear to be well
But what if those family members wanted nothing to do with you?
In another tweet, he complained: "We all have insane aunts and relatives etc and my family is no different", before adding: "To the six angry Democrat Gosars-see you at Mom and Dad's house!"
In a startling new campaign ad, Gosar's brothers and sisters - Grace, David, Jennifer, Tim, Joan and Gaston - all speak out against their brother's political policies.
In another video shown by the Brill campaign at a fundraiser in Phoenix on Thursday, Gosar's sister Grace says, "It would be hard to see my brother as anything but a racist".
Gosar was quick to point out an interview his mother, Bernadette Gosar, did with the New York Times in which she decried the ad and said she was both "shocked" and "crushed". They said he isn't fighting for social security, better access to healthcare or jobs in Arizona. He is one of 10 children and three of his other siblings seemed to have not participated.
In one video, Gosar's brothers and sisters talk about how he's gone down the wrong path.
"He's not listening to you", says Tim Gosar.
Paul Gosar did not respond to a request for comment sent to his spokeswoman.
The six who spoke out are not the Congressman's only siblings. However, Brill's ad is sure to draw attention to a campaign race previously out of the national eye.
"None of this is pleasant for any of us", David Gosar says.
David Gosar suggested to the New Times that his brother's health may be deteriorating. Another said he traded in everything he learned around the family kitchen table.
Gosar's younger brother, Pete, was a college football player at the University of Wyoming, where the Gosars grew up, and Pete ran for governor in Wyoming twice and was the Democratic nominee in 2014, but eventually lost in the general election.
Paul, an outspoken Donald Trump fan, won his district with 71 percent of the vote in 2016.