Control of the Senate was up in the air Wednesday morning as four contests are still too close to call – Arizona, Georgia, Nevada and Wisconsin. The balance of power in the chamber remains tied at 48-48, and final results could potentially be delayed until next month because the race between Democrat Sen. Raphael Warnock and Republican Herschel Walker appears headed for a runoff because neither candidate has gotten more than 50% of the vote. With 98.6% of the precincts reporting in the Peach State, Warnock led Walker 49.3% to 48.6%. In Arizona, Sen. Mark Kelly, the Democrat incumbent, is leading Republican challenger Blake Masters 51.4% to 46.4% but election officials are still waiting for ballots to be counted from Maricopa County. Election officials in the county, the state’s most populous, reported glitches in machines that tabulate the vote on Tuesday. A final result may not come until Friday. In the other races, Republican Ron Johnson had 50.5% of the vote to Democrat Mandela Barnes’ 49.5% in Wisconsin, and in Nevada Democratic Sen. Catherine Cortez Mastro was trailing Adam Laxalt 47.2% to 49.9% with 72% of the precincts reporting.