Watch: How US President Joe Biden's bid for re-election came to an end

US President Joe Biden has announced that he will end his candidacy for re-election, saying "it is in the best interest of my party and the country".

It follows weeks of intense pressure from fellow Democrats after a faltering debate performance against Republican Donald Trump at the end of June.

He said in his statement he would address the nation on the matter next week and and gave his endorsement to his Vice President Kamala Harris, saying she should be the Democratic party's presidential nominee.