As David Cameron prepares to take the stand at the Leveson Inquiry, Peter Oborne investigates just how close the Prime Minister got to the Murdoch empire. Did the Tories agree to help the mogul secure a business deal worth £8 billion? Oborne speaks to those close to Cameron, reveals new insight into his relationship with Murdoch's inner circle and explains the magnitude of the political crisis now confronting the country. Senior journalists stand accused of bribery, police officers of corruption, and now a Prime Minister and parts of his cabinet are fighting for their political lives.