Billionaire Elon Musk's America PAC has been warned by the Justice Department that its $1 million daily giveaways to registered voters may violate federal law, US media reported Wednesday. Musk, the world's richest man, announced the contest on Saturday in Pennsylvania, one of the seven "swing states" that will likely determine who will become the next US president -- Donald Trump or Kamala Harris. FRANCE 24's Emily Boyle reports. Fraser Jackson is on the campaign trail in Philadelphia.