On April 2, 2019, six United States Senators sent Attorney General William Barr a formal letter to follow-up about pending applications to manufacture marijuana for scientific research. “Our nation’s need for meaningful federally sanctioned research is critical. Research and medical communities should have access to research-grade materials to answer questions around marijuana’s efficacy and potential impacts, both positive and adverse. Finalizing the review of applications for marijuana manufacturing will assist in doing just that,” according to U.S. Senators Brian Schatz, Dianne Feinstein, Lisa Murkowski, Cory Gardner, Christopher A. Coons, and Tim Kaine.