A courtroom showdown is set to begin Tuesday over how Georgia will certify who clinches the swing state in the US presidential contest, one of several high-stakes clashes coming to a head before the Nov.

Certifying presidential elections is a regulated process that historically played out without much drama or fanfare until the aftermath of the 2020 presidential election. But fights over election certification are becoming more frequent and widespread as Republicans in battleground states that could be decided by only thousands of votes try to challenge the process.

Supporters of the rules say they are necessary to ensure the accuracy of the vote totals before county election officials sign off on them. But critics say they worry that supporters of Trump could use the rules to delay or deny certification.

A Georgia judge on Tuesday is set to consider a challenge to new rules implemented by the state's Republican-controlled election board, as Democrats seek to undo last-minute changes they have said are designed to undermine trust in the results of the Nov.

Democrats sued Georgia’s State Election Board on Monday over a new rule that requires counties to hand-count the number of ballots cast at polling places on Election Day, arguing it will allow “for bad-faith actors to claim that fraud has affected election results.

The Georgia State Election Board and Republicans will square off against Democrats Tuesday over controversial rule changes to the November contest.

Kamala Harris is supporting a lawsuit that accuses the Georgia State Election Board of breaking the law by requiring counties to hand count ballots in the presidential election.

The Republican majority on the State Election Board voted to approve the rules last month. Democrats filed a legal challenge.

The lawsuit claims that the new rule would invite chaos on election night, delaying some reporting and putting the security of ballots at risk.

The state and national Democratic Party said the rule might introduce "uncertainty" in vote tallying, and "wreak havoc on the general election."