If you look at the trends since Harris joined the race, it does highlight some differences between the states.

In Arizona, Georgia, Nevada and North Carolina, the lead has changed hands a few times since the start of August but Trump has a small lead in all of them at the moment.

In the three other states - Michigan, Pennsylvania and Wisconsin - Harris had led since the start of August, sometimes by two or three points, but the polls have tightened significantly and it is currently tied in Pennsylvania.

All three of those states had been Democratic strongholds before Trump turned them red on his path to winning the presidency in 2016. Biden retook them in 2020 and if Harris can do the same then she will be on course to win the election.