Facebook Inc’s decision comes amid concerns that the tech giant’s loose approach to free speech could be exploited again to interfere with the vote.
In addressing such concerns, the Big Tech company has widened the criteria for content to be removed as voter suppression.
It has also created a label for posts by candidates or campaigns that attempt to claim victory before final official election results are released.
Chief Executive Mark Zuckerberg wrote in a Facebook post announcing the changes that he was concerned about the unique challenges voters would face due to the coronavirus pandemic, which has prompted a surge in voting by mail.
"I'm also worried that with our nation so divided and election results potentially taking days or even weeks to be finalized, there could be an increased risk of civil unrest across the country," he said.
Zuckerberg has previously defended his decision to allow for a freewheeling political conversation on Facebook, including through paid ads, which the company exempts from its fact-checking program with external partners, including Reuters.
He said in his post he continued to believe that the "best antidote to bad speech is more speech," but acknowledged that in the final days of an election, "there may not be enough time to contest new claims".
Facebook will continue to allow campaigns and others to run political ads that are already in the system, and will permit them to change spending amounts and user targeting, but will block adjustments to the ads' content or design.