Washington Post columnist Jennifer Rubin falsely claimed on Tuesday that the prosecutor Republicans chose to head up the Kavanaugh hearings previously worked with Sheriff Joe Arpaio.

The GOP chose Arizona prosecutor Rachel Mitchell to question Dr. Christine Blasey Ford and Supreme Court nominee Brett Kavanaugh during Thursday’s hearing about Ford’s sexual assault allegations.

Rubin quickly tweeted that Mitchell is “someone from Sheriff Joe’s operation,” presumably referring to the fact that both served in Maricopa County, AZ during the same time period.

“Only this crowd of clueless old white guys would pick someone from Sheriff Joe’s operation,” Rubin wrote. “I was saying no self-respecting lawyer would take the job of giving cover to GOP cowards. I was right.”

Only this crowd of clueless old white guys wold pick someone from Sheriff Joe’s operation. I was saying no self-respecting lawyer would take the job of giving cover to GOP cowards. I was right. — Jennifer Rubin (@JRubinBlogger) September 26, 2018

However, Mitchell was employed in the Maricopa County Attorney’s office, while Arpaio worked in the Sheriff’s Department — two different agencies.

Twitter users quickly pointed out Rubin’s error and urged her to delete her incorrect tweet.

How incompetent are you that you don’t know or care that the Maricopa County Attorney’s Office is different than the Maricopa County Sheriff?

Donald Trump broke you!!

U r an extremely Petty and mediocre writer who only is around so wapo can say they have conservative voices — kdino75 (@kdino75) September 26, 2018

Amazing that you still have this up, you clown — Mujahed (@kebejay) September 26, 2018

Delete your account — Morgan Ortagus (@MorganOrtagus) September 26, 2018

The biggest reason I can’t take the editorial board of the @washingtonpost seriously is that they continue to proclaim that Jennifer Rubin is conservative. https://t.co/Adm5WwFJMC — Cam Edwards (@CamEdwards) September 26, 2018

This is incorrect. When are you planning on deleting it? — Charles C. W. Cooke (@charlescwcooke) September 26, 2018

Even Republican Senator Orrin Hatch took time to correct Rubin, tweeting, “2,900 tweets and counting for a tweet maligning someone with patently false information.”

2,900 tweets and counting for a tweet maligning someone with patently false information. Mitchell works for the Maricopa County Attorney, not Maricopa County Sheriff. https://t.co/yXyhpZknEf — Senator Hatch Office (@senorrinhatch) September 26, 2018

As of publishing of this article, Rubin had over 7,000 retweets and 26,000 likes on her tweet.

Follow Amber on Twitter