DES MOINES, Iowa (AP) — After decades of failed attempts, lawmakers say this could be the session they succeed in at least beginning to overhaul Iowa’s property tax system. With hopes of adjourning this week, legislators are running out of time, but they express optimism that Republicans and Democrats will reach a deal. Lawmakers have considered changing Iowa’s property tax system for at least 30 years, but the issue is a nightmare for politicians because in Iowa, farmland, businesses and residential property are all taxed differently. To tinker with one means shifting the burden onto the others. This year, though, veteran legislators have reached a bipartisan agreement to address the matter. Republican Rep. Stewart Iverson of Clarion speculates there is a 60 to 70 percent chance that lawmakers will get something done on property taxes.