US election 2016: Stop whining, Obama tells Donald Trump

US President Barack Obama has told Donald Trump to “stop whining” as he rejected his claim that next month’s White House election will be rigged.

He said Mr Trump’s attempt to discredit a poll before it has even taken place was “unprecedented” for a US presidential candidate.

Read more: http://www.bbc.com/news/world-us-canada-37697594