That's a trailer bike for children. Obama has two young girls. Interesting that the press avoided snapping photos of the kids -- I wonder if there's some sort of voluntary blockade against photographing the young children of presidential hopefuls?
Well, BikePortland covered his campaign stop to the city last month. I don’t know if Obama knew how bike friendy Portland is before going in but he seemed impressed by what he saw. Also, Chicago is supposedly one of the more bike-friendly cities in the country. Makes sense that he would be open to promoting bicycles. The sidewalk thing irked me until I realized he had his kids in tow.