College graduates ' support increased from 39 % to 52 % in just three years , the support of self - identified conservative Republicans ( a group not traditionally supportive of cannabis legalization ) had increased to nearly 30 % .
Bipartisan support had increased across the board .
College graduates ' support increased from 39 % to 52 % in just three years , the support of self - identified conservative Republicans ( a group not traditionally supportive of cannabis legalization ) had increased to nearly 30 % , and bipartisan support had increased across the board .