US election: Obama calls Trump's election rhetoric 'dangerous'

President Barack Obama says Republican Donald Trump's insistence that he might not accept the election result is "dangerous".

Speaking at a campaign rally in Miami for Democratic nominee Hillary Clinton, the president said Mr Trump's comments undermined American democracy.

Mr Trump refused in a televised debate to say he would accept the outcome of the election on November 8.

He later said he would accept a clear result but left a challenge open. 
 
BBC