OKLAHOMA CITY (AP) — While much of the political attention has been focused on the race for Oklahoma’s open 2nd Congressional District seat, voters in eight separate state House and Senate races will decide their nominees on Tuesday’s primary runoff election.

There will be eight primary runoffs for open legislative seats — four each in the Senate and House.

Republicans currently hold a 32-16 advantage in the Senate and a 67-31 edge in the House, with three seats vacant. The GOP is expected to maintain healthy majorities in both chambers, Democrats are hoping to chip away at those advantages.

The Republican primary runoffs in the Senate include Rob Standridge and Jack Beller for the Senate District 15 seat in Norman that is currently held by term-limited Republican state Sen. Jonathan Nichols. The winner will face Democrat Claudia Griffith of Norman.

In the District 17 Senate seat in Oklahoma and Pottawatomie counties, Republicans Ron Sharp and Ed Moore face off in a winner-take-all primary runoff, since no Democrats filed for the seat currently held by retiring Democratic state Sen. Charles, Laster of Shawnee.

Republicans Nathan Dahm and Tim Wright are battling for the District 33 Senate seat in Tulsa, another winner-take-all primary runoff in which no Democrat filed for the seat. Current Democratic state Sen. Tom Adelson was drawn out of the district during redistricting and decided not to seek reelection.

In the new Senate District 43 seat that includes McClain County and portions of Garvin, Grady and Stephens counties, Republicans Corey Brooks of Washington, Okla., and Peggy Davenport of Duncan will square off to determine who will face Democrat Mike Fullerton of Newcastle in the general election.

Primary runoffs in the House include the District 88 seat in Oklahoma City, where Democrats Kay Floyd and Mike Dover are looking to replace former state Rep. Al McAffrey, who won a special election earlier this year for an open Senate seat. The winner will face Republican Aaron Kaspereit in November.

Other primary runoffs in for House seats include Democrats Jerry Rains and Bobby Jefferson for the House District 14 seat in Muskogee; Republicans Mark McBride and Paula Sullivan for the District 53 seat in Moore; and Republicans Ken Walker and Shane Saunders for the District 70 post in Tulsa. Both the District 53 and District 70 races are winner-take-all primaries, since no Democrats filed for office. The winner of the Democratic primary in District 14 will face Republican Arthur Hulbert of Fort Gibson in November.

Several primary runoffs for county seats also will be held on Tuesday, along with special elections for municipal and school proposals.