But the Canadian singer-songwriter says his application for citizenship has been delayed because he uses marijuana.
This policy applies regardless of state or local marijuana use laws.
The policy stems from Jeff Cession's move
USCIS told CNN it could not comment on Young's request being detained, citing protection of privacy, but said the agency requires me to decide on cases based on federal law.
"Persons committing violations of a controlled federal substance are facing potential immigration consequences under the Immigration and Nationality Act (INA), which applies to all foreign nationals, regardless of the state or jurisdiction in which they reside." , a spokesman for the agency told CNN in a message.
"Marijuana remains illegal under federal law as a Schedule I controlled substance, regardless of any action to decriminalize its possession, use or sale at state and local level," the statement continues. "Federal law does not recognize the decriminalization of marijuana for any purpose, even in places where the government or local law does."
Young criticized Trump before
Young said he may have to leave the country while his naturalization procedures are underway.
"I sincerely hope I have a good moral character and will be able to vote my conscience on Donald J. Trump and his fellow American candidates (not yet named)," he wrote. "I'll keep you posted, but I don't think I'll be able to stay parked here during the procedure."
The artist is a vocal critic of Trump.