Farm leaders have predicted all along there’d be less money to write a farm bill in 2013. Now those predictions may be about to come true. House Ag and maybe Senate Ag plan to start rewriting the failed 2012 Farm Bill in late February. But that’s exactly when extraordinary Treasury measures to extend the nation’s borrowing limit will be exhausted - followed by automatic spending cuts in early March - followed by expiration of a short-term government funding measure in late March. National Farmers Union President Roger Johnson sees a perfect storm developing