Commentary Last week, the Biden administration promised gun control groups that it will soon roll out a massive push for limits on firearm purchases and other measures. President Biden reiterated that promise on Sunday. And the television networks aren’t waiting to lay the groundwork for this effort. CBS is in a full-court press for gun control on its evening entertainment television shows. The bad guys are always white supremacists who use machine guns—supposedly AR-15s—to commit mass public shootings. Criminals in Mexico supposedly get machine guns from the United States. A father’s desire to protect his family only leads to tragedy when his daughter gets into the gun safe and uses the weapon in a mass public shooting. And guns in the home pose a danger for children. Gun registration is necessary for solving crime. NBC isn’t to be left out, showing a woman who tried but failed to use a gun to protect herself. Instead, …