On Friday, September 21, U.S. Customs and Border Patrol released an official statement on the non-admissibility of Canadian’s involved with the legalized cannabis industry (Canadian or U.S. states) to enter the U.S.
“Generally, any arriving alien who is determined to be a drug abuser or addict, or who is convicted of, admits having committed, or admits committing, acts which constitute the essential elements of a violation of (or an attempt or conspiracy to violate) any law or regulation of a state, the United States, or a foreign country relating to a controlled substance, is inadmissible to the United States.”
You can read the full release here