Every few months a new poll comes out showing record support for marijuana legalization. But the latest results are still pretty overwhelming.

The Center for American Progress teamed up with GBA Strategies to find out what percent of Americans support marijuana legalization. In a poll of 1,000 American voters, they found that 68 percent support marijuana legalization with 40 percent saying they strongly support it and 28 percent saying they somewhat support it. Perhaps even more surprising is that the poll found that 57 percent of Republican voters say they support marijuana legalization as well.

The poll also showed that 73 percent of voters approve of sealing or expunging records of people convicted of minor marijuana crimes, while only 19 percent said they opposed doing so.

Last year, for the first time ever polls showed that the majority of Republicans supported marijuana legalization. However, those polls showed only a slight majority of Republicans supported it. This poll indicates that conservative voters support cannabis legalization by a pretty significant margin.

It is unusual though that considering all of these polls showing broad support for marijuana legalization, politicians continue to advance prohibitionist policies. If they're supposed to appeal to the most voters they can, wouldn't they support legalization?

(h/t Center for American Progress)