Nearly a quarter of respondents in a pre-primary Indiana poll were undecided or wanted another option in the U.S. Senate race between Luke Messer, Mike Braun, and Todd Rokita. The poll showed 29% supported Messer, 28% supported Braun, and 19% supported Rokita. When asked who could best defeat incumbent Joe Donnelly, responses were more split, though Donnelly led all three Republicans in hypothetical matchups. The poll received over 400 responses.