> "As has been well documented, I smoked pot as a kid, and I view it as a bad habit and a vice, not very different from the cigarettes that I smoked as a young person up through a big chunk of my adult life," Mr Obama said. >But he added that in terms of its impact on the individual consumer "I don't think it is more dangerous than alcohol".

This came out on top when searching for it.

To be fair, he phrased it it as “experimenting with drugs”, but as far as I know only the Cannabis is publicly known.