Trump long has relied on NDAs to prevent criticism. That strategy may be unraveling.

He and his allies recently have lost initial rounds in legal battles to stop damaging books by former top White House officials and his niece Mary L. Trump.

Now, in one of the most sweeping efforts by a former associate to undo nondisclosure agreements, the Trump campaign’s former Hispanic outreach director last week filed her latest effort in a class-action suit to void all such campaign contracts. She says they are so broad that they deny individuals their First Amendment right to say anything critical of the president — even as he routinely takes to Twitter to mock and deride his critics.

In a motion for summary judgment in the case, the former campaign worker, Jessica Denson, said the campaign sought a $1.5 million claim against her for violating an NDA. She said that came after she filed a lawsuit alleging sex discrimination by campaign officials. (That separate case is ongoing.)

“These NDAs are representative of the levers of fear that this campaign and administration wield over people,” Denson told The Washington Post. “And if this lever of these NDAs is lifted, it is significant not only for the direct effect it has on people who have signed it, but for a general environment of people who are afraid to speak out.”