SPRINGFIELD — As he cast the opening vote for Senate president, Sen. Dave Koehler told of two kids bickering over an orange.The Peoria Democrat explained to a full Senate this week that a parent settled their dispute by cutting the fruit so each child could have half. The problem was that each kid wanted the orange for something different — one child was hungry and wanted to eat it, while the other wanted to use the peel as a cake ingredient.“You could have satisfied 100 percent of each of the interests …