分析：每次大规模枪击事件后，共和党都通过法律放松枪支管制

研究显示：

Democrats and Republicans respond differently to mass shootings…. Republican legislatures enact 32% more laws the year after a mass shooting than in other years…. When there is a Republican-controlled legislature, mass shootings lead to more firearm laws that loosen gun control. Our point estimates indicate that a mass shooting in the previous year increases the number of enacted laws that loosen gun restrictions by 115% in states with Republican-controlled legislatures.