Why won't Pennsylvania voters have results on Election Night?

Pennsylvania election officials – in a bid to avoid controversy in November – are telling voters ahead of time not to expect the results of the high-stakes presidential race to be ready by Election Night.

The battleground state is of such significant importance this election cycle that Vice President Harris visited Pennsylvania on Aug. 18, ahead of the Democratic National Convention in Chicago, and former President Trump made back-to-back visits both on Aug. 17, when he returned to Wilkes...