Positive polls placing Donald Trump ahead in Pennsylvania and Michigan has led to a fight over prediction accuracy among establishment and upstart pollsters.
An exclusive poll for The Independent, meanwhile, found the majority of Americans believe Trump has harmed the standing of the US in the world.
In Texas, Trump says he is “way ahead in Texas” despite opinion polling showing a statistical toss-up in the Lone Star State. Joe Biden’s running mate Kamala Harris is visiting the state on Friday as Democrats increasingly believe they can cause an upset.
It comes as the state’s 2020 voter turnout surpassed its 2016 total, four days ahead of Election Day, in a milestone that is expected to fuel Republican concerns about the party’s election chances.
Mr Biden himself is meanwhile heading to Iowa, with Mr Trump returning to Wisconsin and Michigan in a bid to shore up support in the Midwest where he appears to be haemorrhaging support in response to his blundering response to the coronavirus pandemic.