ATLANTA -- After years of criticizing mail voting and so-called ballot harvesting as ripe for fraud, Republicans at the top of the party want to change course. They are poised to launch aggressive get-out-the-vote campaigns for 2024 that employ just those strategies, attempting to match the emphasis on early voting Democrats have used for years to lock in many of their supporters well ahead of Election Day. The goal is to persuade voters who support GOP candidates that early voting techniques are secure and to make sure they are able to return their ballots in time to be counted, thus...