Allies of former President Donald Trump who control the Georgia State Election Board approved a controversial new rule Friday requiring counties to hand-count the of ballots cast at polling places on Election Day,

Critics plan to sue, saying the new requirement would almost certainly lead to errors and could disrupt the process of certifying the vote in a crucial battleground state.

Georgia’s Republican-controlled election board voted on Friday to require a labor-intensive hand count of potentially millions of ballots in November, a move voting rights advocates say could cause delays,