Facebook Seeks FTC Chair Lina Khan’s Recusal in Antitrust Case

“When a new commissioner has already drawn factual and legal conclusions and deemed the target a lawbreaker, due process requires that individual to recuse herself,” Facebook said in the petition.

An FTC spokeswoman didn’t immediately respond to a request for comment. Ms. Khan has said previously that she would consult with FTC ethics officials if recusal questions arose.

Facebook’s request comes two weeks after a similar recusal petition was filed by

Amazon.com Inc.,

which is facing multiple investigations at the FTC, and is the latest sign that giant technology companies are favoring aggression over a conciliatory approach with Ms. Khan, who built her career advocating for bold antitrust action to rein in the dominant players in Silicon Valley.

President Biden installed Ms. Khan as the head of the FTC last month, part of a growing administration effort to restrain corporate power.

The FTC soon must decide whether to file a new antitrust lawsuit against Facebook after a judge threw out the FTC’s previous complaint as legally insufficient. Because of the approaching deadlines in the case—the judge’s June 28 ruling gave the FTC 30 days to file an amended lawsuit—it could force Ms. Khan to confront the recusal issue on an accelerated timeline.

Ms. Khan has been a prolific writer about antitrust issues, especially as they related to big tech companies. She previously worked for a progressive antitrust advocacy group and was a key staffer on a congressional antitrust panel that conducted a 16-month investigation of large online platforms and last year recommended that lawmakers take steps to rein them in.

The FTC’s vote on a new Facebook lawsuit is likely to be a divided one. Democrats hold a 3-2 commission majority; if Ms. Khan sat out, there likely wouldn’t be a majority to sue Facebook again. The commission’s two Republican commissioners voted against the first lawsuit the FTC filed against Facebook in December.

The FTC, along with 46 states, had alleged Facebook was engaged in illegal monopolization, including by buying up other companies such as WhatsApp and Instagram to prevent them from challenging Facebook’s market position. The company denied the allegations, saying it competed fairly and achieved success because its services are popular with consumers.

In last month’s ruling, U.S. District Judge

James Boasberg

in Washington dismissed the FTC’s case at the outset of pretrial proceedings, saying the FTC didn’t plead enough allegations to support monopolization claims against Facebook. He also said the FTC didn’t have a valid challenge to Facebook’s policy of refusing to grant interoperability permissions to competing apps. The judge gave the commission 30 days to file a new lawsuit that attempts to make more detailed allegations.

Under the governing legal standards for recusal, a company seeking a commissioner’s disqualification on the grounds of prejudgment must show that a disinterested observer could conclude that the commissioner had already judged both the facts and the law in advance of a proceeding.

Ms. Khan gets to decide in the first instance how to address Facebook’s request for her disqualification. Past FTC practices show that, at least in some circumstances, the whole commission can weigh in.

Disqualification requests haven’t seen much success in modern times, but there are older court rulings that vacated FTC enforcement actions on the grounds that a commissioner should have been disqualified.

Write to Brent Kendall at brent.kendall@wsj.com