In Monday I spoke with a Republican member of Indiana’s legislature who opposes President Donald Trump’s push for the state to redraw its congressional map to gain two GOP seats and help the party hold its House majority in next year’s midterm elections. Trump, with support from Indiana’s Republican governor, Mike Braun, has vowed to back primary challengers against members of the GOP who are, for now, blocking the redistricting plan. The lawmaker I spoke with asked that I not publish his name. He isn’t worried about Trump’s political wrath; he doesn’t plan to run for reelection. His fear of speaking out is much more personal: “I’d rather my house not get firebombed,” he told me by phone.

Such a worry is not as far-fetched as it might sound—not in an America that has seen an eruption of political violence over the past few years, and not in Indiana over the past few weeks. Republicans in the state have faced a wave of “swatting” incidents, in which a false call to emergency services draws a police response, for not endorsing the redistricting plan. (Braun said he and his family have also received threats.)