I live in Oregon where it's legal, and if reddit posters on /r/portland are any example, legalization doesn't (at least instantaneously) stop this instinctive bias against anything negative. You'll see minimization, denial, and "it's better than alcohol" on every thread whenever a study even hints marijuana isn't a 100% universally beneficial, no-side-effects, perfect drug. It's fascinating to behold.
It's not technically legal in any US State, since it's still illegal at a federal level, and so exists at the discretion of the current federal governtment.