A total of $1.23 billion in federal taxpayer dollars has now been sunk in 12 of 23 co-ops created under Obamacare that have gone out of business, representing another Obamacare failure, lawmakers say. Co-ops in Arizona and Michigan went out of business last week, adding themselves to the 10 that have already failed in Utah, Kentucky, New York, Nevada, Louisiana, Oregon, Colorado, Tennessee, South Carolina, and a co-op that served both Iowa and Nebraska.