Republican Cory Gardner has secured a “significant victory” for the GOP by defeating first-term Democratic Sen. Mark Udall in the closely-watched Colorado Senate race, Fox News' Megyn Kelly reported Tuesday night.
Further, Rep. Steve Daines (R-Mont.) won the Montana Senate seat, yet another pickup for Republicans, according to CNN projections.
Cory Gardner, center, Republican candidate for the U.S. Senate seat in Colorado, joins supporters in waving placards on the corner of a major intersection in south Denver suburb of Centennial, Colo. (AP Photo/David Zalubowski)
Republicans needed to pick up just six seats to take control of the Senate. If Gardner's victory holds, it would mean that the GOP need just one more seat to achieve that goal.
The Senate race in Louisiana won't be decided until a runoff on Dec. 6. Neither the Democratic incumbent, Mary Landrieu, nor Republican Bill Cassidy was able to get more than 50 percent of the vote.
In House races, Republicans hold a commanding edge. They are on track to pad their majority at near historic levels and claim Southern seats that have long been held by Democrats.
The Associated Press contributed to this report.