Wendi Deng is perhaps best known in Britain for defending husband Rupert during a physical attack at a parliamentary hearing in 2011.
The Chinese-born businesswoman was seen landing a slap on the face of activist Johnnie Marbles, who had attempted to throw a foam pie at Mr Murdoch.
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A judge ruled the boy may be allowed home from Alder Hey Children’s Hospital, but will not be allowed to go to Rome for further treatment.
Alek Minassian, 25, has been charged with first degree murder.
The president, meanwhile, thanked the French leader for his “steadfast partnership” in the recent missile strike in Syria.