The latest General Social Survey, a widely respected trend survey that has been measuring support for legal marijuana since the 1970s, has found public support for marijuana legalization has reached a new high of 61 percent, with strong support across all age groups and political affiliations.

Following a trend identified by a Gallup poll in 2017, a majority of Republicans -- once staunchly opposed to marijuana legalization -- now favor legalization, according to the poll, which is administered by the NORC Center for Public Affairs Research at the University of Chicago.

The General Social Survey staff found that 54 percent of the Republicans surveyed for the 2018 poll favor legalization. That's the first time a majority of Republicans favored legalization in a General Social Survey. In 2017, Gallup reported that 51 percent of those surveyed who identify as Republican supported legalization. That was the first time that had occurred in 50 years of Gallup asking about cannabis legalization.