Conor Lamb, the Democratic candidate for the March 13 special election in Pennsylvania’s 18th Congressional District celebrates with his supporters at his election night party in Canonsburg, Pa., early Wednesday, March 14, 2018. (AP Photo/Gene J. Puskar)
NEW YORK — The special election in Pennsylvania’s 18th district has made one thing clear: Democrats turned a region that overwhelmingly backed President Donald Trump just 16 months ago into a dead heat. It didn’t matter that this congressional district will effectively disappear next year. Each side fought hard and spent big knowing that the race would help shape the national political landscape heading into the November midterm elections.