It is the first time either Harris or Trump have cracked the 50% mark in Pennsylvania. In Quinnipiac’s August poll of Pennsylvanians, Harris led Trump 48% to 45%. Besides Pennsylvania, Quinnipiac has Harris leading 50% to 45% in Michigan and 48% to 47% in Wisconsin, two other battleground states.

LIKE BIRD-WATCHERS with binoculars, observers of America’s presidential race have had their eyes trained on the opinion polls to see whether they can spot a post-debate bounce for either candidate. Now they can.