In 2014, voters in the cities of Berkeley and San Francisco, California, were asked to decide whether to place an excise tax on sugary drinks sold within their borders. Berkeley made history when it passed the nation's first tax on sugary drinks, despite an aggressive anti-tax campaign from the beverage industry. San Francisco's measure was approved by the majority of voters but failed to reach the two-thirds majority it needed to pass. Given the prominence of these two policy battles and the likelihood that more will follow, the authors of this report evaluated social media, campaign materials and news coverage of the soda tax debates in Berkeley and San Francisco.