The number of mailed ballots not delivered by Nov. 3 is expected to grow as more postal data is released in the coming days.

Demonstrators marched Wednesday in New York to demand that every ballot be counted in the 2020 presidential election. (Justin Lane/EPA-EFE/Shutterstock)
Demonstrators marched Wednesday in New York to demand that every ballot be counted in the 2020 presidential election. (Justin Lane/EPA-EFE/Shutterstock)

More than 150,000 ballots were caught in U.S. Postal Service processing facilities and not delivered by Election Day, agency data shows, including more than 12,000 in five of the states that have yet to be called for either President Trump or Democratic challenger, Joe Biden.Follow the latest on Election 2020

Despite assurances from Postal Service leaders that agency officials were conducting daily sweeps for misplaced ballots, the mail service acknowledged in a court filing Thursday that thousands of ballots had not been processed in time, and that more ballots were processed Wednesday than on Election Day.