ANKENY — Debating the state’s privately managed Medicaid program that cares for over 600,000 Iowans, Fred Hubbell accused Kim Reynolds of failing to make necessary changes and Reynolds accused Hubbell of promising more than he could deliver in their first faceoff Wednesday weeks before the Nov. 6 election.Democrat Hubbell and Republican Reynolds, candidates for governor, appeared on the Des Moines Area Community College campus in the first of three televised debates, this one sponsored by the Des Moines Register and KCCI-TV.Hubbell criticized Gov.