Many socially desirable policies are not implemented because of their ex-ante unpopularity, but this
unpopularity may be overcome through experience with the policy. In this paper, we examine how opposition to
carbon pricing in the state of Washington turned into support after voters experienced a cap-and-trade policy
with revenues earmarked for environmental purposes – "cap-and-invest." Analyzing voting behavior at the
census block group level, we observe that support varies by political affiliation as expected, but experience
consistently increases support across the board. Using a proprietary survey, we further show that the increase in
support among voters in Washington state is specific to the cap-and invest policy they experienced; support for
carbon pricing or climate policies more generally remained unchanged.