Country music legend Willie Nelson has some advice for Attorney General Jeff Sessions, who said marijuana is only “slightly less awful” than heroin.

Nelson, a longtime advocate for legal pot, told Rolling Stone:

“I wonder if he’s tried both of them. I don’t think you can really make a statement like that unless you tried it all. So I’d like to suggest to Jeff to try it and then let me know later if he thinks he’s still telling the truth!”

The 84-year-old County Music Hall of Famer has his own brand of marijuana, Willie’s Reserve, for sale where it’s legal and often speaks highly of his own personal experiences with the drug.

Rolling Stone asked if there’s been a downside to his own habit.

“I haven’t run into any yet,” he said. “I guess if you go somewhere where it’s illegal, that’s a pretty good downside.”

Police have arrested the singer several times for marijuana-related offenses.

Nelson also shared his thoughts on President Donald Trump.

“I knew him back when he owned some casinos, and I worked for him,” Nelson told the magazine. “He always paid me. I had no problems at all.”

However, Nelson said Trump has “stepped into a different world” from the one he’s used to.

“Like he said this morning, ‘I had no idea this job was going to be this hard,’” Nelson said. “It’s easy when you can just go bankrupt anytime you want to and say, ‘I’ll check you later.’ But that’s hard to do when you’re president of the United States.”

Nelson said he’s come close to running for office himself, “and then I sobered up.”