term in office. Polk County Soil and Water Conservation District Commissioner Sherrie Taha is running for the Democrats. United States Senate Incumbent Democratic Senator Tom Harkin is retired rather than run for re-election to a sixth term in office. U.S. Representative Bruce Braley was the only Democratic to file to run and thus the de facto nominee. Five Republicans filed to run: radio host Sam Clovis, State Senator Joni Ernst, former CEO of Reliant Energy Mark Jacobs, businessman Scott Schaben and former U.S. Attorney for the Southern District of Iowa and nominee for Treasurer of Iowa in 2002 Matthew Whitaker. United States House of Representatives All of Iowa's four seats in the United States House of Representatives will be up for election in 2014 and are contested. Iowa General Assembly The 25 odd-numbered Iowa Senate seats are up for election in 2014, as are all 100 Iowa House seats. As of the primary filing deadline for the two major parties, there are 11 Senate seats and 58 House seats that only have candidates from one party, though several of these seats have contested primaries. These numbers are from the primary election candidate listing, so do not take into account candidates nominated by third parties, candidates nominated by petition, or candidates nominated by a major party after the primary. Such candidates file during the general election filing period, which runs from July 28 – August 15, 2014. References Iowa