Bob Casey in a narrow victory. But while he prevailed the second time around, the final results could once again be so close that the race ends up in a statewide recount, potentially pushing the nationally watched battle into the second half of November.

Incumbent Democrat U.S. Senator Bob Casey’s campaign did not waive a legally mandated automatic recount by Wednesday’s deadline, according to the Pennsylvania Department of State. Last week’s race between Casey and Republican Dave McCormick has remained close to the half-percent margin that would trigger an automatic recount.