Kamala Harris now leads in US polls but state-level data puts race on knife-edge

Analysis of 2024 polling and previous elections involving Donald Trump suggests race is still too close to call

National polls for the US presidential race have been upended ever since Kamala Harris took over from Joe Biden to run against Donald Trump.

While Biden was trailing the Republican former president nationally and in many crucial swing states, Harris has gained about three points in national polls since becoming the nominee.