U.S. Sens. John McCain and Jon Kyl led a group of Republican officials Wednesday denouncing a ballot measure that would allow medical marijuana.

Arizona Gov. Jan Brewer said Oct. 20 that she opposes a November ballot measure that would legalize medical marijuana in the state, arguing that it would cause pot to "needlessly and harmfully proliferate."

Legislative budget analysts project that 66,000 Arizonans would register under a proposed medical marijuana program that is the subject of a November ballot question.

Voters will consider up to 10 ballot measures in November, including the constitutional protection for hunting and fishing, elimination of affirmative action and decriminalization of medical marijuana.