The recount, if completed, would have cost more than $1 million, according to Department of State estimates. It’s unclear how much the shortened effort cost.

Pa., on Thursday conceded the race for Pennsylvania's Senate seat to his Republican opponent, Dave McCormick. NBC News projected McCormick's win in the hotly contested battleground state race shortly after Casey's concession,

Pennsylvania Secretary of the Commonwealth Al Schmidt has ordered counties to halt recounting ballots in Pennsylvania’s U.S. Senate race. The order comes a day after incumbent U.S. Senator Bob Casey conceded the race to Republican Dave McCormick.