The lawsuit says rescinding the CBA would affect public safety, calling it “an act of retaliation” against the union and an "attempt to punish free speech."

The widely anticipated lawsuit seeks to overturn Homeland Security Secretary Kristi Noem's attempts to cancel a TSA collective bargaining agreement.

The union for Transportation Safety Administration (TSA) employees is suing Homeland Security Secretary Kristi Noem after she said she was ending a collective bargaining agreement signed last year. The American Federation of Government Employees (AFGE) argues Noem has no power to end an already authorized seven-year contract,