Attorney General Jeff Sessions seems to be butting heads with just about everybody, from marijuana advocates to even his boss, President Donald Trump. But it looks like he's directly taking on his new nemesis: the state of California.

Sessions and the Department of Justice filed a lawsuit against the state of California over its Sanctuary State status. After Trump's election, the state of California, along with a handful of cities across the United States, passed sanctuary laws that said that local police departments would not help the federal government enforce immigration policies. The Justice Department is seeking to overturn those laws.

The lawsuit revolves around the Supremacy Clause of the Constitution that states that when federal and state laws conflict, federal law should prevail. For example, the 1965 Voting Rights Act passed by Congress meant that laws passed by state governments that instituted roadblocks for voting were no longer valid.

This isn't the first time the Trump administration has attempted to attack Sanctuary states and cities. Last year, President Trump signed an executive order that would withhold funds from these states and cities, but a judge blocked those aspects of the order. The Department of Justice then instituted a policy that would withhold grant money from local law enforcement that didn't comply with federal immigration law, which was also overturned in court.

The question is whether the Trump administration will use this same argument to attack states with legal marijuana in the future.

(h/t Buzzfeed)