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District profile: Polk County has historically voted Democratic, but it has become more Republican as its white-collar businesses grow and its blue-collar businesses fade. 2004 results: Democrat Leonard Boswell defeated Republican Stan Thompson 55 percent to 45 percent.
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LEONARD BOSWELL (D)
Elected in 1996; seeking sixth term; Boswell was unopposed in the primary.
• Campaign Web site
• Official Web site
• DCCC profile
- Born: Jan. 10, 1934; Harrison County, Mo.
- Family: Married (Dody); three children.
- Education: Graceland College, B.A., 1969.
- Professional: Farmer.
- Military: Army, 1956-76 (Vietnam).
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JEFF LAMBERTI (R)
Lamberti, the state Senate president, was unopposed in the primary.
- Born: Oct. 21, 1962; Ankeny, Iowa.
- Family: Married (Shannon); two children.
- Education: Drake University, J.D., MBA, 1989; B.A., 1985.
- Professional: Attorney.
- Military: None.