Sens. Cory Gardner and Elizabeth Warren have introduced a bill to legalize marijuana at the federal level in the name of “states’ rights.” In reality, it would give birth to Big Tobacco’s successor.

This dangerous proposal would allow the marijuana industry to market high-potency pot candies, gummies and 99% pure extracts (compare that with 5% potent Woodstock weed). With 70% of today’s illicit drug users having started with marijuana, not prescription drugs, according to the National Institute on Drug Abuse, this is exactly...