ST. PAUL, Minn. (AP) — Supporters of medical marijuana are trying to turn up the heat on Gov. Mark Dayton with a new TV ad that will debut in prime late-night and daytime slots.

Their ad features a St. Paul woman and her 5-year-old son, whose daily seizures from intractable epilepsy have been eased by medical marijuana. The woman, Angela Garin, says in the ad she was shocked to learn that Dayton is blocking legalization of medical marijuana in Minnesota.

Dayton's office said it was preparing a response. Dayton has declined to support legalization but said it's unfair to portray him as the sole obstacle on the issue.

The Washington-based Marijuana Policy Project says it bought $10,000 in airtime for the ad. It debuts Wednesday night on David Letterman's and Jimmy Fallon's shows.

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