Topic: Proposition 56

A man smokes a cigarette Tuesday, March 1, 2016, in San Francisco. Officials will vote Tuesday on whether to increase the minimum age to buy tobacco from 18 to 21 in San Francisco, even as opponents argue that cities and counties cannot trump California law. If the measure is approved, San Francisco would join Boston, New York City and Hawaii in raising the minimum age to buy cigarettes and other tobacco products. (AP Photo/Ben Margot) (AP)

Stanton Glantz - The Conversation