(CNN) Sixteen states on Monday evening filed a lawsuit challenging President Donald Trump's national emergency declaration.

The group of states, led by California Attorney General Xavier Becerra, filed the lawsuit in the US District Court for the Northern District of California.

"We're going to try to halt the President from violating the Constitution, the separation of powers, from stealing money from Americans and states that has been allocated by Congress, lawfully," Becerra told CNN's Kate Bolduan Monday.

The attorneys general from Colorado, Connecticut, Delaware, Hawaii, Illinois, Maine, Maryland, Michigan, Minnesota, Nevada, New Jersey, New Mexico, New York, Oregon and Virginia joined California in the lawsuit.

It's the latest challenge to hit the Trump administration, which already faces a litany of lawsuits over the national emergency declaration. Over the weekend, the Center for Biological Diversity, Border Network for Human Rights, which marched with Beto O'Rourke in El Paso, Texas, last week, and the American Civil Liberties Union all announced lawsuits.

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