US President Donald Trump and his predecessor, Barack Obama, have directed blistering attacks at each other during rival rallies. Campaigning for Democratic White House nominee Joe Biden in Pennsylvania, Mr Obama likened Mr Trump to a “crazy uncle” and said he emboldened racists. In North Carolina, the Republican president mocked Mr Obama for being wrong about the 2016 election outcome. With 13 days to go until this election, Mr Biden holds a solid lead nationally. But the margin is slimmer in the handful of US states that could go either way and ultimately decide the outcome on 3 November.(BBC)…[+]