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.

Pennsylvania Democratic Senator Bob Casey refuses to concede his race to Republican Dave McCormick, even though U.S. media outlets have called the race.