A coalition of 22 state attorneys general is calling on Congress to address “the glaring vagueness” that has led to legal cannabis products being sold over the counter across the country — including sometimes from vending machines or online.

A letter dated March 20 addresses the consequences of Republican lawmakers’ choice to legalize hemp production in the 2018 omnibus Farm Bill — a decision that perhaps inadvertently led to a multibillion-dollar market in intoxicating cannabis products that are arguably federally legal.

Now, the attorneys general want Congress to shutter the market it helped create. In the new Farm Bill, they want the legislature to enshrine in statute the idea that intoxicating cannabis is not federally legal — contrary to what the law currently states.