Proponents of Measure 91, which would make marijuana legal for adults in Oregon and regulate cultivation and retail sales, are up in arms at the discovery that  federal funds are being used to bring drug warrior Kevin Sabet and company to their state to fight against the initiative. [caption id="attachment_7968" align="alignright" width="300"] Anthony Johnson, Yes On 91[/caption] While being billed as nothing more than an educational tour, the two-day conference in Oregon will spend at least half…