The variety of federal forces deployed to support President Trump’s mass deportation campaign and anticrime efforts continues to expand. Often, it can be difficult for the public to tell them apart, or to understand what powers each agency has.

What began with Texas drawing what could be five new Republican districts in the House of Representatives at President Trump’s behest has spiraled into a nationwide redistricting race. Nick Corasaniti, a New York Times reporter covering national politics, gives an overview.