Wohlforth, I believe that your thinking is incorrect regarding LGBT and Marijuana. Its not people changing their minds.

The left would have always supported those two issues and on the right, true conservatives (not religious right) will quickly remind you of their long held believe that 'it's not the governments business one way or another'.  These true conservatives are the voters who made the changes possible, not through changing their views on these issues but through no longer being willing to side with the religious right as a definition of conservative.