The US presidential election outcome comes down to voters in seven key battleground states. This year’s swing states are: Arizona, Georgia, Michigan, Nevada, North Carolina, Pennsylvania, and Wisconsin. With its 19 electoral votes, Pennsylvania is the largest prize among the battleground states and an important piece of both campaigns’ path to victory. What is a ‘swing state’?These battleground states are where candidates from both major political parties have a reasonable chance for victory in a statewide race or presidential vote. The termswing state refers to a state that has gone back and …