Colorado Gov. John Hickenlooper on Sunday said he is close to calling marijuana legalization a successful experiment.

The Democratic governor, who opposed Amendment 64 in 2012, was asked the question on “Meet the Press with Chuck Todd.”

Hickenlooper said that if he was faced with the same marijuana legalization question again, he would be close to supporting it.

“I don’t think I’m quite there yet, but we have made a lot of progress,” the governor said. “We didn’t see a spike in teenage use, if anything it’s come down in the last year, and we’re getting anecdotal reports of less drug dealers.”

Hickenlooper’s thoughts on marijuana mark a significant evolution on the subject for the governor, who when recreational use was legalized in 2012 quipped, “Don’t break out the Cheetos or Goldfish too quickly.”

The governor said the state has been able to use marijuana revenue to address potential unintended consequences to marijuana legalization.

“Maybe the system is better than what was admittedly a pretty bad system to begin with,” Hickenlooper said.

His comments come as the White House signaled a potential crackdown on the cannabis industry. Trump press secretary Sean Spicer said there would be “greater enforcement,” though the comments were vague.

“It’s never my choice to be in conflict with federal law,” Hickenlooper said, though he added that he is not sure the federal government could do much to shut the industry down.

The governor is optimistic that the White House will respect sovereignty of the states. He highlighted that U.S.  Attorney General Jeff Sessions said that marijuana will not be a top enforcement priority.

But if things change with the federal government, Hickenlooper is prepared to fight for Colorado.

“It’s in our constitution. I took a solemn oath to support our constitution,” he said.

“Over 60 percent of American people are now in a state where either medical or recreational marijuana is legalized. This has become of the great social experiment of our time.”

Watch the full interview by clicking here.