New measures include plans for the Justice Department to crack down on self-assembled "ghost guns," and make "stabilising braces" subject to registration under the National Firearms Act.
US Attorney General William Barr's remarkable comments come as Donald Trump's campaign persists in trying to prove there was fraud in key states of Georgia, Michigan, Pennsylvania and elsewhere.
The report is certain to add more pressure on US Attorney General Jeff Sessions, whose job security is seen as being in jeopardy after President Donald Trump criticised him.
Attorney General Jeff Sessions says the arrest of WikiLeaks founder Julian Assange is now a priority for the US.
The Republican senator from Alabama is seen as a conservative hardliner with a controversial record on civil rights and immigration.
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