President Donald Trump signed an executive order Thursday suspending the security clearances of employees at Perkins Coie, citing the law firm’s diversity, equity and inclusion practices.

President Trump suspends security clearances for Perkins Coie employees, marking a significant change for the Seattle law firm.

The order against the firm, which did work for Democrats during the 2016 campaign, represents an escalation of efforts to punish groups the president sees as aiding his enemies.