US President Joe Biden has said only the "Lord Almighty" could convince him to end his bid for re-election, as he sat for a rare primetime interview in an effort to calm Democratic concern over his candidacy.

Speaking to ABC News on Friday, Mr Biden also declined to take a cognitive test and make the results public in order to reassure voters he is fit to serve another term.

The 81-year-old once again pushed back on the idea, aired by some Democratic officials and donors, that he should stand aside for a younger alternative following his disastrous debate with Donald Trump last week.

Subscribe here: http://bit.ly/1rbfUog

For more news, analysis and features visit: www.bbc.com/news

#JoeBiden #USElection #BBCNews