Some of the Iowans at the Republican National Convention have had a real “Planes, Trains and Automobiles” experience. Remember the 1987 movie in which actors Steve Martin and John Candy traveled cross-country, trying to make it home for Thanksgiving? Well, three Iowans and a South Dakotan had a similar experience as they tried to make it to Philadelphia for the convention. The four men flew into Chicago yesterday, but their flight to Philly was cancelled. They rented a car, and drove instead — arriving mid-day today. Mike Sexton of Rockwell City, a state Senator who’s an Iowa convention delegate, has on-the-road experience. He drove a semi for 10 years. Sexton says they only stopped to get gas and go to the bathroom.George Moriarty of Spencer was a bit put off by the airline’s decision to cancel their Sunday evening Chicago to Philadelphia flight.Tim Kangas of Iowa Falls says if they had waited in Chicago for a flight to Philadelphia, they’d still be waiting. He says the earliest flight they could have gotten on would’ve left at nine tonight, so they beat that by nine hours.Nathan Schock of Sioux Falls, South Dakota, has seen the movie, several times, but he says he’ll never watch it again. In other convention-related news, Iowa Senator Tom Harkin, a democrat, was in Philadelphia this morning to attack the record of G-O-P nominee and Texas Governor George W. Bush. Harkin says almost one-and-a-half million children in Texas are not covered by health insurance, the worst record in the country, according to Harkin.Harkin left Philadelphia to take his message to Ohio, where Bush is campaigning today.