Secretary of Homeland Security Markwayne Mullin on Wednesday backed a House Republican’s call for bipartisan legislation to increase penalties for protesters who publicly disclose the identities of Immigration and Customs Enforcement personnel.

ICE officers, especially if they are unmasked, have been frequently doxed as they conduct immigration enforcement operations. This pattern reemerged at Delaney Hall in New Jersey last week when an anti-ICE protester threatened to kill an officer and his family.