FILE - In this April 8, 2014, file photo, Sen. Deb Fischer, R-Neb., accompanied by Senate Minority Leader Mitch McConnell of Ky., talks during a news conference on Capitol Hill in Washington. Nebraska voters on Tuesday, May 15, 2018, will pick U.S. Senate nominees for both parties out of crowded fields of candidates who hope to claim the seat held by incumbent Fischer. (J. Scott Applewhite, File/Associated Press)

LINCOLN, Neb. — Nebraska voters will pick Senate nominees for both parties Tuesday out of crowded fields of candidates who hope to claim the seat held by Republican Deb Fischer.

Fischer faced a primary challenge from four fellow Republicans but was expected to win the party’s nomination for a second term. The winner of the GOP contest will enter the general election as a heavy favorite in deep-red Nebraska.

Fischer has focused on her first-term accomplishments, including her work to pass highway funding legislation. She also stressed her Senate experience, such as her position on an Armed Services subcommittee.

The others seeking the GOP nomination are retired Omaha math professor Jack Heidel; writer and retired air conditioning technician Dennis Frank Macek; former finance manager Jeffrey Lynn Stein; and Lincoln businessman Todd Watson.

Some of Fischer’s primary opponents have argued she hasn’t been conservative enough, but Fischer received endorsements from a majority of the state’s elected Republican officials as well as major farm and business groups. Before being elected to the Senate, she was a rancher and state legislator.

Her Democratic challengers, meanwhile, are vying for the chance to mount an uphill battle against Fischer, who has outraised every candidate from both parties.

Lincoln City Councilwoman Jane Raybould is the best-known Democrat in the field, partly because of her unsuccessful bid for lieutenant governor in 2014 with running mate Chuck Hassebrook. Raybould has served on the City Council since 2015 and helps run her family’s grocery store chain.

The other Democratic hopefuls are retired farmer, attorney and judge Frank Svoboda of Lincoln; retired Fremont real estate broker Larry Marvin; and Chris Janicek, the owner of an Omaha specialty cake business.

Fischer was elected to the Senate in 2012 after defeating two higher-profile Republicans — Attorney General Jon Bruning and State Treasurer Don Stenberg — in the primary. She went on to defeat Democrat Bob Kerrey, a former governor who was running for his old Senate seat, by nearly 16 percentage points.

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