People who film immigration operations in their cities say federal agents are surveilling and intimidating them. In some cases, they say agents have threatened to add them to a list of domestic terrorists. A new lawsuit filed in Maine against the Department of Homeland Security argues this pattern violates the First Amendment. NPR’s Jude Joffe-Block reports. Support NPR and hear every episode of Trump's Terms sponsor-free with NPR+. Sign up at plus.npr.org.To manage podcast ad preferences, review the links below:See pcm.adswizz.com for information about our collection and use of personal data for sponsorship and to manage your podcast sponsorship preferences.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy