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Jim Bridenstine

Oklahoma voters consider another switch in House delegation

Navy pilot Jim Bridenstine pulled off a congressional upset four years ago when he ousted a five-term GOP incumbent from his Tulsa-area seat. The same year, Markwayne Mullin, a Republican plumber, won over thousands of Little Dixie voters in his southeastern Oklahoma district when Democrat Dan Boren left office.

And two years ago, Republican Steve Russell, a war hero whose unit helped capture Saddam Hussein, became central Oklahoma's third different congressman since 2007, replacing James Lankford, who sought and won the Senate seat when Tom Coburn retired.

All five Republicans who make up Oklahoma's U.S. House delegation have drawn primary challenges ahead of Tuesday's...