Once they exercise their right to vote Tuesday, Marylanders should expect to exercise patience waiting for results. Many will be available election night but counting mail-in and provision ballots, with a federal holiday next week, could take more time than usual.

Maryland's state election board unanimously approved a set of guidelines Tuesday laying out how thousands of mail-in ballots will be tabulated for the primary election, a move needed after a ballot mix-up led to the mailing of 437,000 replacement primary ballots.