US Elections 2016: Barack Obama tells Donald Trump to quit whining and try to get votes

United States President Barack Obama has asked Republican presidential nominee Donald Trump to "stop whining" after rejecting the latter's claim that the upcoming elections will be rigged.

"I'd advise Mr Trump to stop whining and try to make his case to get votes," Obama said in a White House Rose Garden news conference on 18 October.

"By the way. (It) doesn't really show the kind of leadership and toughness that you want out of a president, if you start whining before the game's even over. If whenever things are going badly for you and you lose, you start blaming somebody else, then you don't have what it takes to be in this job," he added.

Trump has earlier alleged that the 8 November election will be absolutely rigged for Democratic candidate Hillary Clinton.

Obama said the "flattery remarks" made by Trump for Russian President Vladimir Putin and his political approach is unprecedented.

"Mr Trump's continued flattery of Mr Putin and the degree to which he appears to model much of his policies and approach to politics on Mr Putin is unprecedented," he said.

Just a day before, Trump had expressed his desire to visit Russia after being elected as the United States President.

"If I win on November 8, I could see myself meeting with Putin and meeting with Russia prior to the start of the administration," he said while talking to a talk-radio host.