CHINA is waging a “campaign of psychological warfare” against Australia, an Aussie academic has warned. Professor Clive Hamilton, author of the controversial book Silent Invasion: China’s Influence in Australia, gave a talk to US Congress overnight in which he warned of dire consequences if Australia gives too much leeway to the rising superpower. “Beijing knows that it cannot bully the United States — in the current environment the consequences would be unpredictable and probably counter-productive — so it is instead pressuring its allies,” Prof Hamilton said. “Last week the PLA Navy challenged three Australian warships sailing through the South China...