The issue focused on the section of the bill that would allow police to question people they arrest for simple marijuana possession. A similar provision is also in a federal law.

Marijuana Policy Project National Press Secretary Mason Tvert said: "We have some pretty strong questions about this particular language, and we're going to be fighting it."

Tvert said he has been working with others in Washington state to move forward on their own version of the measure, which was supported by President Obama in his State of