Census data plays a big role in trying to answer, was this map drawn fairly? And exactly gets the authority to draw these districts? Ohio is one of seven states losing a congressional seat, going from 16 to 15 starting with next year's election. In colorado and oregon, map makers have less than weeks to get their first draft done. Early numbers from april showed colorado's population grew nearly 15 % over the last decade. That's enough to give colorado an extra seat in congress next year.