Coalition leader Peter Dutton singled out China as the biggest threat to Australia's national security and pressed Prime Minister Anthony Albanese on whether Welcome to Country ceremonies were overdone in a fiery final leaders' debate. The leaders were also quizzed about the the economy, housing, Donald Trump and the cost of eggs on Sunday, with 60 undecided viewers selected by the Seven Network handing the win to Mr Albanese. National security featured heavily in the hour-long debate, with Mr Dutton citing intelligence and defence officials who he said are worried about China, in the context of potential conflict in our...