State election officials across the US are reporting record numbers of voters casting their ballots ahead of election day on 3 November.
More than 22m Americans had voted early by Friday, either in person or by mail, according to the US Election Project.
At the same point in the 2016 race, about 6m votes had been cast.
Experts say the surge in early voting correlates to the coronavirus pandemic, which has caused many people to seek alternatives to election day voting.
On Tuesday, Texas, a state that has relatively tight restrictions on who can qualify for postal voting, set a record for most ballots cast on the first day of early voting.
On Monday, the Columbus Day federal holiday, officials in Georgia reported126,876 votes cast – also a state record.
In Ohio, a crucial swing state, more than 2.3m postal ballots have been requested, double the figure in 2016, BBC reported.
The enormous numbers of voters have led to long lines, with some people waiting for up to 11 hours for an opportunity to vote.