Semi-automatic military-style firearms like that used in the Parkland shooting can be legally modified to fire like machine guns, using accessories called “bump stocks.” President Donald Trump called to ban bump stocks after they were used to kill 58 and injure hundreds in Las Vegas last year, but so far has failed to implement any practical change. The National Rifle Association’s Dana Loesch has allowed that bump stock regulations should be “reviewed” but says the organization does not support a ban.

At a meeting with governors from across the country yesterday, Trump promised to step up his efforts. “Bump stocks, we are writing that out.” he said. “I don’t care if Congress does it or not, I’m writing it out myself.”

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