From hanging chads to deadlocks, presidential elections that took weeks and months to decide

PHILADELPHIA — For the nation’s overwrought nervous system, the 2020 presidential campaign was akin to a punitive marathon. And now the finish line has been moved back.In most presidential elections, the results become clear within hours of the polls closing, the losers graciously concede, the winners thank everyone and then celebrate, and the public accepts the results long before the Electoral College formalizes them in December.That obviously hasn’t been the case in 2020.Ballots are still in question, legal challenges are underway, and it’s not clear yet when the outcome in the race between…