Eric Holder pointed out previous home secretaries and judges had indicated Scots-born Mr McKinnon could be extradited to America.
But he denied claims the issue had damaged his relationship with Mrs May, which he said "is and remains strong".
The US Attorney General has admitted he was "disappointed" with Theresa May's decision to block the extradition of computer hacker Gary McKinnon.
Eric Holder pointed out previous home secretaries and judges had indicated Scots-born Mr McKinnon could be extradited to America.
But he denied claims the issue had damaged his relationship with Mrs May, which he said "is and remains strong".
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