Sen. Sherrod Brown backs ‘bump stock’ gun-control bill, while Sen. Rob Portman says he’ll review it

WASHINGTON — Democrats in Congress will try to outlaw devices that can turn semi-automatic weapons into a close approximation of machine guns, days after a Las vegas gunman used such “bump stocks” to make it easier to mow down concertgoers at an outdoor festival, killing 58 and injuring about 500.

Ohio U.S. Sen. Sherrod Brown, a Democrat, said he will back the bill, introduced Wednesday by Sen. Dianne Feinstein, a California Democrat. More than 20 other Democrats have signed on as well.

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