When states take action that defies the feds, people will eventually get on board.

Recent polling on federal enforcement of marijuana prohibition in states that have legalized the plant bears this out, and shows Americans support nullification in practice, even if not in name.

Public Policy Polling surveyed voters in the early primary states of New Hampshire, Iowa and South Carolina, and found that overwhelming majorities agree that “states should be able to carry out their own marijuana laws without federal interference.”

In South Carolina, 65 percent agreed that the feds should leave states alone to administer their own policies on weed. Just 16 percent think that “the federal government should arrest and prosecute people who are following state marijuana laws.”

In New Hampshire, 73 percent agreed that states should carry out their own marijuana laws, and in Iowa it was 71 percent.

Marijuana Majority commissioned the poll. When the organization broke down the results by demographics, they found consistent majorities believe the federal government should not enforce its prohibition in states that have legalized marijuana. This proved true even among Republicans and older voters, groups less likely to support marijuana legalization.

“Across the three state polls, the new data shows majority support for letting states set their own marijuana laws without federal interference among all political persuasions and demographics, including Republicans, 2012 Mitt Romney voters, people older than 65 and those who identify as very conservative. While support for scaling back federal prohibiti