Chester County, Pa., election workers process mail-in and absentee ballots at West Chester University in West Chester, Pa., Nov. 4, 2020. (AP Photo/Matt Slocum, File)
WASHINGTON (AP) — Democratic officials in 19 states filed a lawsuit Thursday against President Donald Trump's attempt to reshape elections across the U.S., calling it an unconstitutional invasion of states' clear authority to run their own elections.