8 races that will help determine Senate control in the U.S. election

Democrats had Senate control prior to election, but have many more seats to defend than Republicans

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Caption: The U.S. Capitol in Washington, D.C., is shown in March 2022. There are guaranteed to be several new members of the Senate come January, and there is a chance control of the chamber could flip from the Democrats to the Republicans. (Chip Somodevilla/Getty Images)

While most eyes will be riveted on the outcome of Tuesday's U.S. presidential election between Democratic candidate Kamala Harris and three-time Republican candidate Donald Trump, the congressional elections in the U.S. House of Representatives and Senate will help determine the country's political climate through 2028.
The Democrats have controlled the Senate in the legislative session that's about to end, with 47 party members and four independents who regularly vote with them. In addition, Harris as vice-president has broken ties on Senate votes on more than 30 occasions.
Thirty-four Senate seats are up for grabs in Tuesday's election. Prior to election day, 11 were held by Republicans, 21 by Democrats and two by Independents — Bernie Sanders, 83, of Vermont and Angus King, 80, of Maine — who caucus with the Democrats. The Associated Press reported early on election night that Sanders had retained his Senate seat.
There will be at least nine new faces in the Senate, as that's the number of races that feature a seat that's being vacated.
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With so many seats to defend, the Democrats were perceived to have a tough hill to climb in order to retain the Senate.
With the victory of 73-year-old Republican Jim Justice in West Virginia — a seat that had been vacated by Joe Manchin — the Republicans moved a step toward winning Senate control. State polling had indicated the race was not competitive.
Should the Republicans win the Senate, the gavel will pass from Majority Leader Chuck Schumer of the Democrats — but it won't be handed to former majority leader Mitch McConnell, who has announced he won't vie for the leadership again.
In addition to legislative and watchdog functions, the Senate votes on approving federal court judges, Supreme Court justices and various U.S. cabinet and government positions that require its confirmation.
Here are the candidates in some of the key races.

Michigan

Image | Election 2024 Michigan Senate

Caption: This combination of images shows Republican Michigan Senate candidate Mike Rogers, left, in University Center, Mich., on Oct. 3, and opponent U.S. Rep. Elissa Slotkin in Detroit on Sept. 2. (Alex Brandon/The Associated Press, Paul Sancya/The Associated Press)

Michigan's seat is in play as Democrat Debbie Stabenow opted not to seek a fifth term. Elissa Slotkin, 48, prevailed in the Democratic primary, defeating actor Hill Harper. Slotkin is a former CIA analyst and held a Defence Department position in Barack Obama's administration before running and winning a House seat in 2018.
Republican Mike Rogers, 61, is a known quantity in the state. The former FBI agent served in the Michigan legislature in the 1990s and then won several elections in Michigan's 8th District beginning in 2001, before stepping away from politics in 2015. Before this current run, he was an analyst with CNN, building off his time as House intelligence committee chair.

Montana

Image | Election 2024 Montana Senate

Caption: U.S. Sen. Jon Tester, left, and Republican Montana Senate candidate Tim Sheehy are shown during a debate in Missoula, Mont., on Sept. 30. (Ben Allan Smith/The Missoulian/The Associated Press)

Democrats are concerned about the prospects for Jon Tester, who's won three close Senate election races in a state that overwhelmingly opted for Trump in the presidential races of 2016 and 2020. The 68-year-old farmer and former school music teacher served in Montana's legislature before heading to D.C. in 2007, where he's occasionally gone against his party, as with his support for the Keystone XL pipeline.
Tim Sheehy is one of several very wealthy Republican candidates(external link) looking to enter the Senate. He's a 38-year-old former U.S. Navy Seal who founded an aerospace company that proved very profitable. While he earned a Purple Heart for an incident in Afghanistan, he's faced allegations of stolen valour in another, mysterious incident(external link) in which he suffered a gunshot wound.

Nebraska

Image | Election 2024 Nebraska Senate

Caption: Independent Nebraska Senate candidate Dan Osborn, left, is shown in Omaha, Neb., on May 15. He's looking to defeat incumbent Republican Sen. Deb Fischer, who is shown in Washington, D.C., in March 2023. (Nikos Frazier/Omaha World-Herald/The Associated Press, Alex Bandon/The Associated Press)

This race is a potential wildcard, as Dan Osborn is running as an Independent and has been coy as to whether he'd caucus with the Democrats or Republicans. The U.S. Navy veteran has decried the Senate as "a country club of millionaires that work for billionaires." He's an industrial mechanic who gained national recognition three years ago when he successfully led a strike at Kellogg's cereal plants(external link).
Deb Fischer, 73, is a lifelong Nebraska native who held a school board position for more than a decade, spent time in the state legislature and since 2012 has been a U.S. senator. She gave Trump good marks in his first term on his strong support for beefed-up national security and national defence, and in his appointment of conservative federal judges.

Nevada

Image | Election 2024 Nevada Senate

Caption: This combination of images shows, from left, Republican Nevada senate candidate Sam Brown on Sept. 13 and Democratic Sen. Jacky Rosen on Oct. 17. Both were photographed in Las Vegas. (Alex Brandon/The Associated Press, John Locher/The Associated Press)

Republican Sam Brown is a retired Army captain who suffered significant burns while on duty in Afghanistan in 2008, caused by an improvised explosive device. The 40-year-old has limited experience aside from military service, running unsuccessfully in a state election race in Texas, where he used to reside, as well as in a 2022 campaign for the U.S. Senate in Nevada.
Jacky Rosen, 67, was a first-term congresswoman from a Las Vegas-area district when she defeated incumbent Republican Sen. Dean Heller in 2018. She's tapped into her humble background, which includes attending community college, working as a Las Vegas casino waitress and serving as president of a prominent Jewish synagogue in Henderson, Nev.

Ohio

Image | Election 2024 Ohio Senate

Caption: Hundreds of millions of dollars have been poured into the Ohio Senate race. Democratic Sen. Sherrod Brown, left, is shown in Washington, D.C., in December 2022, while Republican opponent Bernie Moreno is seen in Vandalia, Ohio, on March 16. (Mariam Zuhaib/The Associated Press, Jeff Dean/The Associated Press)

Democratic Sen. Sherrod Brown's bid for a fourth term is shaping up to be his toughest to date, with the race on track to be the most expensive Senate contest this cycle. The campaigns, parties and outside groups have spent more than $400 million US on ads, according to the campaign ad tracking firm AdImpact. The 71-year-old Brown previously spent 14 years as a U.S. House member, as well as two decades in state politics.
Bernie Moreno, 57, was born in Bogota, Colombia, and belongs to a family of influence(external link) in Latin American business and politics. He has lived in Ohio for 20 years, building a fortune as a luxury car dealer and blockchain entrepreneur before expressing an interest in national politics, running previously for the seat eventually won in 2022 by Sen. J.D. Vance.

Pennsylvania

Image | Election 2024 Pennsylvania Senate

Caption: Republican Pennsylvania Senate candidate David McCormick, left, is shown in Pittsburgh in September 2023. He is challenging Democratic stalwart Bob Casey, shown at an event in Chicago on Aug. 22. (Gene J. Puskar/The Associated Press, Paul Sancya/The Associated Press)

Bob Casey, the son of a former Pennsylvania governor, served as state treasurer and auditor general before being elected to the U.S. Senate. The 64-year-old moderate Democrat is a key ally of labour unions and the current administration, and is seeking his fourth term in office after three clear-cut Senate election wins.
David McCormick is a 59-year-old Gulf War veteran who left the state to attend and graduate from West Point military academy. He later got a doctoral degree from Princeton, and then served in a high-ranking U.S. Treasury position in George W. Bush's administration. After that, he was CEO of Bridgewater Associates, one of the world's largest hedge funds.

Texas

Image | Election 2024 Texas Senate

Caption: Republican Sen. Ted Cruz of Texas, left, is shown in Oklahoma City in April 2022. Democratic opponent and current Rep. Colin Allred, right, is shown in Chicago on Aug. 22. (Sue Ogrocki/The Associated Press, Paul Sancya/The Associated Press)

The Calgary-born Ted Cruz, seeking a third term, famously clashed with Trump while both were running for the Republican nomination for president in 2016, but he became a loyalist when Trump was in the Oval Office. While Cruz, 53, angered many Texans by being on a personal trip during a bad storm in 2021, the Harvard-educated lawyer is a powerful voice on the Senate's judiciary and foreign relations committees.
Democrats could not beat Cruz in 2018 with the celebrated Beto O'Rourke. The party's hope this year is Colin Allred, 41, who spent parts of four seasons as a linebacker with the Tennessee Titans in the NFL, got his law degree from the University of California, Berkeley after retiring from football and since 2018 has served in the House, where he has sometimes been critical of the Biden administration's border policies.

Wisconsin

Image | Election 2024 Wisconsin Senate

Caption: Trailblazing Sen. Tammy Baldwin, left, is shown in Superior, Wis., on Jan. 25. Her Republican opponent is Eric Hovde, seen in Madison, Wis., on Feb. 20. (Alex Brandon/The Associated Press, John Hart/Wisconsin State Journal/The Associated Press)

Democrat Tammy Baldwin, after several years as a state legislator, became the first openly gay woman elected to U.S. Congress in 1998, beginning a 15-year run as a House representative. Since 2013, the 62-year-old has served as one of the state's two senators.
Republican Eric Hovde, 60, plunged into a frigid Lake Mendota earlier this year to prove his Wisconsin bona fides. He was born and raised in the state but has most recently been CEO of California-based H Bancorp and its primary subsidiary, Sunwest Bank.