American politics currently has more unlikely story lines than anything you might see in New York’s Broadway theatre district. The rise of Donald Trump is one illustration of the depth of public frustration with politics as usual. Stephen Sackur talks to Anthony Weiner who was a rising star of the Democratic Party in New York. His career was destroyed by not one but two bizarre sex scandals. Why did he push the self-destruct button?(Photo: Anthony Weiner, former US Democrat Congressman, 2013. Credit: Andrew Burton/Getty Images)