Senate majority could take weeks after Election Day to determine

Voters hoping to immediately know who will control the U.S. Senate in the next Congress may be in for a shock on election night as it could take days or weeks to tabulate results in key states.

Some election officials are already warning about delays.

"We will not have final results on election night," a spokesperson for Nevada Secretary of State Barbara Cegavske told Fox News Digital.

"Voters, candidates and the public should not expect complete results on election night," Pennsylvania Acting Secretary of State Leigh Chapman said in a recent media briefing.

"We understand that voters, candidates and the media want election results as soon as possible," Chapman said. "But counting all the eligible votes and reporting the results take time."