An unprecedented 50 percent of Americans think it's high time that marijuana should become legal in the United States, according to a Gallup poll. That's up from 46 percent from a year ago -- and way up from a mere 12 percent in 1969, when Gallup first asked the question and 84 percent of respondents opposed to legalization. "If this current trend on legalizing marijuana continues, pressure may build to bring the nation's laws into compliance with the people's wishes," the pollsters said in a statement.