Lying Rep. George Santos has co-sponsored legislation introduced in the House last week that would name the AR-15 the “National Gun of the United States.” The bill, put forward in the House last Friday by Rep. Barry Moore (R-Ala.), more specifically seeks to declare that an “AR-15 style rifle chambered in a .223 Remington round or a 5.56x45mm NATO round [would be] the National Gun of the United States,” according to a summary of the legislation. The full text of the bill has not been released. Santos, who has been under fire since admitting to The Post in December that...