The mayor of Decatur wants to get a job in Springfield.  Mayor Mike McElroy made it official Wednesday morning that he intends to run for the Illinois Senate in 2012.  Lawmakers drew a new political map this year, so the seat would be open to new candidates.  The 48th District includes parts of Decatur and Springfield, and stretches into Macoupin and Madison counties.  Political insiders say the map was drawn to favor a Democrat.  McElroy is a Republican.  Two Democrats, including a man who works for the Illinois Senate President, have already expressed their interest in the seat.