Live results: Balance of power in Congress

(NewsNation) — The balance of power could shift in both chambers of Congress on Election Day, led by several toss-up races that could determine which party holds power in the federal legislature. See the results of the presidential election here.

A total of 34 U.S. Senate seats will be determined on Election Day, with Democrats and Independents representing 23 of those races. Democrats are vying to hold on to the slim majority they have held in the upper chamber of Congress for the past two years. Some of the seats they will defend are in tougher-to-hold battleground states, including Arizona, Florida, Michigan, Pennsylvania and Wisconsin.

Meanwhile, Republicans hold a narrow majority in the U.S. House of Representatives with 220 seats over the Democrats who held 212 and three seats being vacant into Tuesday’s election. While there were hundreds of races, just a tenth of the races were deemed competitive, according to the Cook Political Report.

Twenty-five were considered toss-ups with 11 of the seats held by Democrats and 14 by Republicans, and 17 races were rated as either leaning Democratic or leaning Republican.

Balance of Power in US House and US Senate

Key US Senate races to watch

The balance of power in the U.S. Senate will likely be determined by the outcome of these races:

Arizona: Democrat U.S. Rep. Ruben Gallego vs. Republican Kari Lake

Florida: Republican U.S. Sen. Rick Scott vs. Democrat Debbie Mucarsel-Powell

Maryland: Democrat Angela Alsobrooks vs Republican Larry Hogan

Michigan: Democrat Elissa Slotkin vs. Republican Mike Rogers

Missouri: Republican U.S. Sen. Josh Hawley vs. Democrat Lucas Kunce

Montana: Democrat U.S. Sen. Jon Tester vs. Republican Tim Sheehy

Nevada:  Democrat U.S. Sen. Jacky Rosen vs. Republican Sam Brown

New Mexico: Democrat U.S. Sen. Martin Heinrich vs Republican Nella Domenici

West Virginia:  Republican Gov. Jim Justice vs. Democrat Glenn Elliott

Wisconsin: Democrat U.S. Sen. Tammy Baldwin vs. Republican Eric Hovde

Key US House races to watch

Here are the races expected to make a difference in the U.S. House of Representatives:

Alaska: Democrat U.S. Rep. Mary Peltola vs. Republican Nick Begich

Arizona District 1: Republican U.S. Rep. David Schweikert vs. Democrat Amish Shah

California District 13: Republican U.S. Rep John Duarte vs. Democrat Adam Gray

California District 22: Republican U.S. Rep. David Valadao vs. Democrat Rudy Salas

California District 27: Republican U.S. Rep. Mike Garcia vs. Democrat George Whitesides

California District 41: Republican U.S. Rep. Ken Calvert vs. Democrat Will Rollins

California District 45: Republican U.S. Rep. Michelle Steel vs. Democrat Derek Tran

Colorado District 8: Democrat U.S. Rep. Yadira Caraveo vs. Republican Gabe Evans

Iowa District 3: Republican U.S. Rep. Zach Nunn vs. Democrat Lanon Baccam

Maine District 2: Democrat U.S. Rep. Jared Golden vs. Republican Austin Theriault

Michigan District 7: Democrat Curtis Hertel, Jr. vs. Republican Tom Barrett

Michigan District 8: Democrat Kristen McDonald Rivet vs. Republican Paul Junge

Nebraska District 2: Republican U.S. Rep. Don Bacon vs. Democrat Tony Vargas

New Mexico District 2: Democrat U.S. Rep. Gabe Vasquez vs.Republican Yvette Herrell

New York District 4: Republican U.S. Rep. Anthony D’Esposito vs. Democrat Laura Gillen

New York District 17: Republican U.S. Rep. Mike Lawler vs. Democrat Mondaire Jones

New York District 19: Republican U.S. Rep. Marc Molinaro vs. Democrat Josh Riley

North Carolina District 1: Democrat U.S. Rep. Don Davis vs. Republican Laurie Buckhout

Ohio District 13: Democrat U.S. Rep. Emilia Sykes vs. Republican Kevin Coughlin

Oregon District 5: Republican U.S. Rep. Lori Chavez-DeRemer vs. Democrat Janelle Bynum

Pennsylvania District 7: Democrat U.S. Rep. Susan Wild vs. Republican Ryan Mackenzie

Pennsylvania District 8: Democrat U.S. Rep. Matt Cartwright vs. Republican Rob Bresnahan

Virginia District 7: Democrat Eugene Vindman vs. Republican Derrick Anderson

Washington District 3: Democrat U.S. Rep. Marie Gluesenkamp Perez vs. Republican Joe Kent

NewsNation’s Safia Samee Ali contributed to this story.

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