 Gun politics has changed a lot since the 1990s. We have a much more divided nation over guns. We have a much more divided Congress over guns. So the number of assault rifles owned by civilians rose from 400,000 in the early 90s to more than 20 million now. And many of the mass shootings that have happened in the past couple of decades, including Sandy Hook and Uvalde, were carried out using an AR-15 or an AR-15 style weapon.