The mass shooting that killed at least 59 people in Las Vegas on Sunday night is expected to rekindle the debate in Congress over federal gun control. But recent efforts in the Republican-led House have centered around loosening firearms laws, not tightening them.

Democrats wondered, however, whether the Las Vegas attack would change any minds on Capitol Hill. Rep. Jamie B. Raskin (D-Md.) said he hoped the scale of the tragedy, with many dozens dead and hundreds wounded, would make a difference.

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