In the wake of the Pulse shooting, Nadeau called on Congress to address gun violence in local communities and stop blocking District laws. In 2017, Nadeau introduced a bill that would authorize a court to issue a temporary civil protection order, temporarily prohibiting someone from having firearms if the court has a reasonable belief that the subject poses an immediate risk to themselves or others. The D.C. Council's Judiciary Committee held a public hearing on the bill on March 22, 2018.