The law is unworkable in states that did not opt for expanded Medicaid, with or without the subsidies.
Most of the states that opted for the federal exchanges, also turned down expanded Medicaid. Without expanded Medicaid, the federal subsidies are unworkable. They would leave a huge gap of people in the middle, who would have to pay the full, high rate for Obamacare coverage. The Feds cannot force states to expand Medicaid coverage. Therefore, the law collapses under its own weight.
Be still my beating heart...