Harris ups lead over Trump, although presidential race still on knife edge

After another shocking week, latest Guardian 10-day polling averages survey shows vice-president ahead by 2.6 points

The US presidential election remains on a knife edge 45 days before voters go to the polls, despite Kamala Harris enjoying one of her most encouraging spells of opinion polling since becoming the Democrats' nominee nearly two months ago.

During yet another momentous week that began with a suspected second assassination attempt against Donald Trump, the latest Guardian 10-day polling averages survey shows Harris increasing her lead to 2.6 points, 48.5% to 45.9%.