by Lauri Baron There’s a national gun crisis when: The NRA has more influence than the PTA. Russia’s bombing of markets and schools generates bipartisan cooperation on aiding Ukraine, whereas domestic massacres result in partisan polarization over common sense gun regulation. You can purchase a rifle privately without a background check when you’re 18 in Texas but must wait until you’re 21 to purchase beer. States censor books deemed too controversial for youngsters to read but permit the carrying of weapons in public to intimidate or kill them. Candidates brandish and fire guns in their ads r…