US Vice President Kamala Harris leads Republican rival Donald Trump by 5 percentage points in an poll released on Sunday that found that respondents have come to see her more favourably since she emerged as the Democratic candidate for president.Asked about their views of Harris since she became the nominee, 48 per cent of 1,000 registered voters surveyed said it was positive, compared to 32 per cent in July — the largest jump among politician ratings polled since President George W Bush’s favorability rose after the September 11, 2001, attacks.