Pew's poll, released last week, found massive support for medical marijuana:
[73%] say they favor their state allowing the sale and use of marijuana for medical purposes if it is prescribed by a doctor, while 23% are opposed. Support for legalizing medical marijuana spans all major political and demographic groups, and is equally high in states that have and have not already passed laws on this issue.
On complete legalization:
41% of the public thinks the use of marijuana should be made legal while 52% do not. In 2008, 35% said it should be legal and 57% said the use of marijuana should not be legal, according to data from the General Social Survey. Twenty years ago, only 16% of the public said the use of marijuana should be legal and 81% said it should not be legal.