Pennsylvania’s nationally watched U.S. Senate race between Democratic incumbent Bob Casey Jr. and Republican challenger Dave McCormick was still too close to call as of mid-morning on Wednesday, with no sign of a concession speech coming from either campaign.

Incumbent U.S. Senator Bob Casey and Republican challenger Dave McCormick are tied in the final Emerson College Polling/The Hill survey of the Pennsylvania U.S. Senate race before Election Day. The poll of 1,