Lowell sent a letter Thursday to U.S. Attorney General Pam Bondi accusing the Trump administration of targeting NY's attorney general for "retribution"

A Winston & Strawn spokesperson declined to comment on whether Lowell's departure had anything to do with the representation of James, who faces a criminal referral from a Trump administration official.

Abbe Lowell is defending New York Attorney General Letitia James against a Trump administration investigation after leaving Winston & Strawn, his firm of the past seven years.