The Trump administration on Thursday will free federal prosecutors to more aggressively enforce marijuana laws, effectively threatening to undermine the legalization movement that has spread to six states, most recently California.

The Justice Department is expected to rescind an Obama-era policy of discouraging federal prosecutors from bringing charges of marijuana-related crimes in states that had legalized sales of the drug.

It was not immediately clear whether the administration intends to carry out a federal crackdown on marijuana dispensaries, or is merely rattling its saber. The Associated Press first reported the announcement, and a government official familiar with the matter confirmed that the change would be announced later on Thursday.

– Read the entire article at The New York Times.