Contrast Mr. Trump’s concerns, feigned or real, with his reaction to Baltimore homicides. Those 30 dead in Ohio and Texas? Charm City lost 38 in July. and it wasn’t even a record. But did Mr. Trump come here to mourn the dead or offer reforms? Did he make calls to governors and mayors? Did he “vow to act with urgent resolve?” Maryland isn’t a swing state. Most of the victims are not white. Baltimore’s murder tally doesn’t cause President Trump to grieve, it was a punch line, a prop he used to ridicule the local member of Congress, an African-American man, who happens to be investigating his administration. Apparently, Mr. Trump forgot to condemn the local congressmen in Dayton and El Paso for the criminal behavior of people in their districts. The president has had 31 months to prove he cares about gun violence. How could anyone take him seriously now?