US presidential candidates Kamala Harris and Donald Trump have entered the final 10-week stretch to election day, with the Democrat surging after an electrifying speech accepting her party's nomination at the Democratic National Convention (DNC). But with some voters on the left still unconvinced, a final victory is far from certain.
Less than three weeks before the 10 September presidential debate between the US vice president and the Republican ex-president, and only a month before early voting kicks off, polls show the race for the White House is neck and neck.
