The White House says it expects law enforcement agents to enforce federal marijuana laws when they conflict with states that permit the recreational use of the drug.
The Obama administration said the federal government wouldn't interfere in states where the non-medical use of marijuana is allowed.
During yesterday's news conference, press secretary Sean Spicer says allowing recreational marijuana to stand is encouraging the abuse of other drugs.
"When you see something like the opioid addiction crisis blossoming in so many states around this country, the last thing we should be doing is encouraging people... there is still a federal law that we need to abide by when it comes to recreational marijuana and drugs of that nature."
He made the distinction between medical and recreational marijuana and says President Trump understands the benefits the medicine can have on those with terminal illnesses.