evidence: President Joe Biden returned this week to his claim that the Second Amendment was originally understood and applied to ban the private ownership of cannons. It is not just an embarrassing repetition of a false claim but threatens to reduce his own gun control measures to little more than cannon fodder on a historical perspective. [...] It does sound bizarre because it is factually and legally untrue. I have received calls from media for years about this claim and it does not improve by repetition. Even the Washington Post has declared Biden’s understanding of the Second Amendment to be false.