Voters wait in line to cast their ballot at an early voting location in Fairfax, Va., on Sept. 18. Growing tensions in the country have some election officials worried about potential violence at polling places.

Voters wait in line to cast their ballot at an early voting location in Fairfax, Virginia on September 18, 2020. – Early in-person voting for the 2020 general election kicked off on September 18, 2020 in Virginia (Photo by ANDREW CABALLERO-REYNOLDS / AFP) (Photo by ANDREW CABALLERO-REYNOLDS/AFP via Getty Images)