A 2022 report found that Canada is not a major source of fentanyl or precursor chemicals to the U.S. The amount is minuscule compared with what comes in from Mexico.

One such drug, fentanyl – a synthetic opioid that’s 50 to 100 times more potent than morphine – is the leading reason U.S. overdose deaths have surged in recent years. While the rate of fentanyl overdose deaths has dipped a bit recently, it’s still vastly higher than it was just five years ago.