This is a new one for me! My research made it to Congress (in written testimony to a subcommittee). Bryce Pardo, a Rand Analyst, in Testimony presented before the House Committee on Homeland Security, Subcommittee on Intelligence and Counterterrorism and Subcommittee on Border Security, Facilitation, and Operations, on July 25, 2019 twice mentioned my paper about fentanyl and the changing geography of the overdose crisis in the US.
(Tiny caveat; the dependent variable in my paper is all overdose deaths, not synthetic opioid overdose deaths, a deliberate choice because of heterogeneity in whether drugs are listed on death certificates).
(Here’s another link to the testimony via the Rand Institute website that might outlast the .gov link)