By THOMAS BEAUMONT
DES MOINES, Iowa (AP) — A retired Navy admiral, Democrat Mike Franken, will challenge Republican Sen. Chuck Grassley’s reelection this fall after winning his party’s nomination over two competitors. Franken beat former congresswoman Abby Finkenauer and physician Glenn Hurst on Tuesday to earn the right to run against Grassley. The veteran Republican is seeking an eighth Senate term. Franken’s primary win is something of a surprise, given Finkenauer was better known throughout the state. Her 2018 victory over a Republican congressman made her the second-youngest woman elected to Congress. Grassley won the Republican nomination over a state legislator and lawyer from Sioux City, Jim Carlin.