federalize

verb

1. (transitive)To unite into a federation.
2. (transitive)To bring under federal control.

   “If the president invokes the Insurrection Act [of 1807], it temporarily suspends Posse Comitatus and allows him to federalize the National Guard and deploy active duty troops to suppress any uprising that interferes with the execution of state or federal law.”

   ““President Trump’s deployment of federalized National Guard troops in response to protests is unnecessary, inflammatory, and an abuse of power,” said Hina Shamsi, director of the ACLU’s National Security Project.”

3. (transitive)To change (a unitary state) into a federation.