 Joe Biden's insisted he's the best person to beat Donald Trump in the US presidential election in November, despite further calls from fellow Democrats for him to withdraw. He was speaking in his first television interview since his poor showing in a debate with Mr Trump. The military leaders of Mali, Burkina Faso and Niger are due to hold their first summit since seizing power in their respective countries. They are meeting in Niger's capital, Niamey, to officially launch a new grouping, the Alliance of Sahel States.