Fox News is the brash cable TV network that has dominated both the ratings and the headlines in America, delivering revenue and power to the Murdoch family empire. On Monday, Four Corners investigates how Fox News became a propaganda vehicle for Donald Trump and helped destabilise democracy in the United States. Featuring Fox News insiders, the program reveals how the network's slavish support of Trump split the Murdoch family and spoiled Rupert Murdoch's succession plans.