Ever since the Iowa Caucus started in 1972, presidential candidates have been flocking to the Iowa State Fair to drink lemonade, cook pork chops, and give campaign speeches. It has become a rite of passage. Here is a look back at some of the candidates who have made the Iowa State Fair an important stop on the road to the White House.<br> Jimmy Carter is shown during a campaign stop at the Iowa State Fair on Aug. 25, 1976.
The Des Moines Register via USA Today Network