in its June 2012 Obamacare decision, the Supreme Court ruled that states aren’t obligated to expand Medicaid, and Texas is currently one of the 25 states that have chosen not to expand the program. In April, Texas Governor Rick Perry, a Republican, called Medicaid expansion “a misguided, and ultimately doomed, attempt to mask the shortcomings of Obamacare” and has resolutely refused to consider it.
http://www.theatlantic.com/health/archive/2014/01/living-poor-and-uninsured-in-a-red-state/282881/