As candidates, staff and media flood Iowa, there will inevitably be photo ops with grain silos and bales of hay. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Men in hazardous materials suits load dead poultry to be buried at Rose Acre Farms Inc., just west of Winterset, Iowa, on May 11. John Gaps III/AP hide caption

itoggle caption John Gaps III/AP

Wisconsin Gov. Scott Walker offers cheese and ice cream to guests in his hospitality room at the Iowa Lincoln Day Dinner in Des Moines on Saturday. Charlie Neibergall/AP hide caption

itoggle caption Charlie Neibergall/AP

A view of the eastern entrance to the Ohio Statehouse. Bob Hall/Flickr hide caption

itoggle caption Bob Hall/Flickr

Former Florida Gov. Jeb Bush speaks to members of the media during a two-day swing through Iowa that had all the trappings of a presidential campaign. Charlie Neibergall/AP hide caption

itoggle caption Charlie Neibergall/AP

Kent Sorenson says he was paid for his endorsement of Ron Paul in the 2012 presidential campaign — and that the exchange was hidden from the public. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

Farmer Seth Watkins (left) and agronomist Matt Liebman stand amid native prairie grasses near Des Moines, Iowa. The conservation strip is used to stop soil erosion. John Ydstie/NPR hide caption

itoggle caption John Ydstie/NPR

The city of Davenport, Iowa, is home to about 100,000 people. The city's mayor, Bill Gluba, wants the city to shelter some of the unaccompanied minors who have crossed the southern border of the U.S., but some members of the City Council oppose his efforts. scmcgee/Flickr hide caption

itoggle caption scmcgee/Flickr

Rep. John Dingell, D-Mich., the longest-serving member of Congress, is celebrated by colleagues, including Vice President Biden, on Capitol Hill in June 2013. A former chairman of the Energy and Commerce Committee, Dingell, now 87, announced in February that he will retire after this term. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

A lot more people now know who Iowa Republican Senate candidate Joni Ernst is, which was the point of the hog-castration line in her campaign ad. YouTube screen shot/Joni Ernst for Senate YouTube channel hide caption

itoggle caption YouTube screen shot/Joni Ernst for Senate YouTube channel
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Dr. Tim Ihrig, a palliative care physician, treats Augie Avelleyra, 93, at his home in Fort Dodge, Iowa. Courtesy of Paula Avelleyra hide caption

itoggle caption Courtesy of Paula Avelleyra

Insurance help isn't easy to find in many Iowa counties. iStockphoto hide caption

itoggle caption iStockphoto