SIOUX CITY — Former Sioux City Explorers player J.D. Scholten scored a decisive win Tuesday, sending the Sioux City Democrat to a matchup with eight-term Republican Rep. Steve King.With about 60 precincts in Iowa 4th District reporting, Scholten had nearly 50 percent of the vote. Spencer City council member Leann Jacobsen was second with 36 percent, while Ames physician John Paschen trailed with 20 percent.Scholten dominated in his home turf, taking 67 percent of the vote in Woodbury County, home to Sioux City, the district’s largest city.