In a disappointing turn for proponents of expanded medical marijuana access, Arkansas Secretary of State John Thurston announced Monday that the initiative, known as Issue 3, failed to meet the threshold of the required signatures to be placed on the November ballot. The petition, submitted by Arkansans for Patient Access, fell short by 2,664 valid signatures. The group needed 90,704 to qualify. Thurston’s office confirmed that only 88,040 were valid after a 30-day cure period. “Our office determined that 10,521 signatures submitted during the cure period were valid,” Thurston stated, accordin…