This paper explores the interface between interactional conduct and sociopolitical change, and makes the case for social action design as an underutilized and unobtrusive index of change. This approach is exemplified through the case of same-sex marriage, whose social standing shifted from marginality to mainstream acceptance within a relatively short period. Using journalistic interview data and in particular question-response sequences addressed to U.S. politicians regarding their position on same-sex marriage (e.g., Do you support legalizing ...