Due to unprecedented numbers of postal votes, there could be days - possibly weeks - between the end of voting and the declared result. And in that period of uncertainty there are fears of civil unrest. Both sides could claim victory, and misinformation about the result could be rife. The worry is that anger, fake news and hate speech on social media could inflame tensions.
So what is Big Tech planning to do about it? The nuclear option would be to close down their apps for a period of time. This is what we know social media companies intend to do to prevent that from happening.
Twitter says after election day candidates won't be permitted to claim they've won the election before a declared result. Twitter also says candidates can't tweet or retweet content that encourages interference with the election process.
Facebook's plans include altering news feed algorithms to suppress viral posts that propagate violence or fake news. They can also deactivate certain hashtags related to misinformation around the election result. And they will lower the bar for what they remove. These are on top of what Facebook is already doing - for example labelling misinformation on voting. They have also teamed up with Reuters to supply accurate election results on the night and in the days after the election.
Reddit says information that seeks to mislead or misrepresent the election results is not allowed and would be removed from the site.
Google is working with the Associated Press (AP)— to provide authoritative election results. So in the days after the election if you searched for "Who won the election?" Google search would direct you to AP's updated results.
Google has also said it will pause ads referring to the 2020 election, the candidates or its outcome after election day. It says it's done this to limit the potential for ads to increase confusion post-election.
YouTube says it will not allow "misleading claims about voting or content that encourages interference in the democratic process". It also says it will remove content falsely claiming that mail-in ballots have been manipulated to change the results of an election.