Mark Zaid’s Security Clearance Debated in Hearing for Injunction

Counsel for veteran whistleblower lawyer Mark Zaid told a federal judge in a hearing Friday that his client was well suited to fight a presidential directive that revoked Zaid’s security clearance.

Zaid’s lawyer—Abbe Lowell, the former Winston & Strawn lawyer who spun off his own firm in May—told Judge Amir Ali in a hearing for preliminary injunction that his client was in the “best position” of the 15 or so individuals named in the presidential memorandum to bring a claim over the loss.

“For 30 years, he has carved out a very specialized niche,” Lowell said. He compared the government’s ...