Via Gallup:
Americans continue to warm to legalizing marijuana, with 64% now saying its use should be made legal. This is the highest level of public support Gallup has found for the proposal in nearly a half-century of measurement.
The latest figure, based on an Oct. 5-11 Gallup poll, follows shifts in the U.S. legal landscape regarding marijuana since Gallup’s 2016 measure. While still illegal at the federal level, the issue was featured on a number of state ballot initiatives in 2016, and with eight states and the District of Columbia having fully legalized marijuana, more than one in five Americans live in a state where they can legally enjoy use of the drug.
Gallup first asked national adults about their views on the topic in 1969, when 12% supported legalization. Support had more than doubled by the end of the next decade but changed little throughout the 1980s and 1990s. By 2001, however, about a third of Americans favored legalizing marijuana, and support has steadily increased since. A majority of Americans have consistently supported legalizing marijuana since 2013.
The trajectory of Americans’ views on marijuana is similar to that of their views on same-sex marriage over the past couple of decades. On both issues, about a quarter supported legalization in the late 1990s, and today 64% favor each. Over the past several years, Gallup has found that Americans have become more liberal on a variety of social issues.