The lawsuit argued a 2019 state law authorizing universal mail-in voting was unconstitutional and that all ballots cast by mail in the general election in Pennsylvania should be thrown out.
Christopher Krebs, who led the federal government's efforts to secure the 2020 election, called the operation near seamless despite President Trump's claims to the contrary.
Voting took place amid a pandemic and unprecedented polarization. Despite baseless claims by the president and his allies that the outcome was rigged, states say the results are accurate.