Some pollsters and party officials say Democratic candidates in California are benefiting from a surge in enthusiasm among young voters eager to back Proposition 19, which would legalize marijuana in certain quantities and permit local governments to regulate and tax it.

Party strategists and marijuana-legalization advocates are discussing whether to push for similar ballot questions in 2012 in Colorado and Nevada—both expected to be crucial to President Barack Obama’s re-election—and Washington state, which will have races for governor and seats in both houses of Congress.

Already, a coalition of Democratic-leaning groups has conducted a poll in Colorado and Washington to test the power of marijuana measures to drive voter turnout.