President Barack Obama called the Republican presidential nominee, Donald Trump, a whiner for repeatedly claiming that the U.S. election is being "rigged" against him and said his complaints about the integrity of the electoral system are unprecedented in modern history.

“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,” Obama said Tuesday during a joint news conference with Italian Prime Minister Matteo Renzi. "I’d advise Mr. Trump to stop whining and go try to make his case to get votes."