Focus on Politics for 2 May 2014

After a 27-year parliamentary career the National Party MP, Maurice Williamson, has resigned as a government minister. His crime was to ring the police about their investigation into domestic violence allegations against businessman Donghua Liu. The Prime Minister, John Key, says Mr Williamson crossed the line and had to go. The Labour Party leader, David Cunliffe, says the case is another example of declining ministerial standards within the Government. Our political editor Brent Edwards looks at the political fall-out from Mr Williamson's fall from grace.