The overwhelming majority of Americans are opposed to current federal marijuana law. That’s the big takeaway from a new poll conducted by Mason-Dixon Polling and Strategy and released by Smart Approaches to Marijuana (SAM), the country’s most prominent anti-legalization group. The poll took a unique approach to a legalization survey. Instead of asking people if they support legalization and giving them a binary yes-or-no choice, it asked 1,000 registered voters about several options for federal marijuana policy. Only 16 percent of Americans favored keeping the current policy. About 29 percent backed only medical legalization, 5 percent backed decriminalization, and 49 percent backed full legalization. The remaining 1 percent were not sure.