Elizabeth G. Oyer, the former pardon attorney, said that she was not told why she was dismissed, but that as events unfolded she feared they might lead to her firing.
The actor Mel Gibson in September. In 2011, he pleaded no contest to a misdemeanor charge of battering his former girlfriend, as part of a deal with prosecutors that allowed him to avoid jail time.
The Trump administration targeted veteran career lawyers who managed pardon work, bankruptcy litigation and other legal issues in the latest wave of forced departures.
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.
President Trump’s order makes Perkins Coie, which did legal work for Democrats during the 2016 presidential campaign, the second law firm to be targeted for retribution.