The Nevada Supreme Court affirmed on Monday that absentee ballots arriving without postmarks can still be counted up to three days after Election Day if they were received by county election officials by Nov. 5.

The ruling denied a challenge from the swing state’s Republican Party, the Republican National Committee, and the Trump campaign, which argued the process risks undermining election security. Backers of the suit sought stricter adherence to Nevada’s absentee voting laws, especially in light of polls predicting a close race between former President Donald Trump and Vice President Kamala Harris in the state.