The House Judiciary Committee passed a measure Wednesday that would require background checks for all gun sales and most gun transfers within the United States, the most significant gun-control legislation to advance this far in Congress in years.

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“Tomorrow is the one-year anniversary of Parkland. It reminds us once again that high-capacity magazines are about high-capacity killing,” Sen. Robert Menendez (D-N.J.), one of the bill’s sponsors, said in an interview Wednesday. “You don’t need 30, 60 or 90 rounds to go hunting or defend yourself.”

 

Menendez said the bill has 31 co-sponsors in the Senate, all Democrats, underscoring the difficulty it could have passing.