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...On Thursday, Facebook announced that it was blocking links to the plans, citing violations of terms of service that limit gun sales and exchanges to licensed dealers....
...In 2015 the FBI carried out more than 23m background checks for licensed firearms transactions, but there are no comprehensive statistics on the volume of unvetted online sales....
...But the president is already facing a backlash from Republicans and the National Rifle Association, a powerful pro-gun lobby. What is wrong with the background checks now?...
...The act ruled that anyone who wanted to buy a gun from a licensed dealer had to pass a background check....
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