An already contentious legal war between the National Rifle Association and its recently estranged public relations firm Ackerman McQueen is getting messier, as lawyers head to three federal courts to challenge what it describes as “harassing” subpoenas issued by the NRA to the firm’s current and former clients.

The NRA issued the subpoenas in conjunction with its lawsuit against the PR firm in the U.S. District Court for the Northern District of Texas, in which the firm has also filed a counter complaint. On Friday, attorneys for Ackerman McQueen with several law firms, including Dorsey & White, filed motions in three different federal courts to quash the subpoenas sent to current and former clients.