The uninsured pour into Memorial Health hospital here: the waitress with cancer in her voice box who for two years assumed she just had a sore throat. The unemployed diabetic with a wound stretching the length of her shin. The construction worker who could no longer breathe on his own after weeks of untreated asthma attacks and had to be put on a respirator. Many of these patients were expected to gain health coverage under the Affordable Care Act through a major expansion of Medicaid, the medical insurance program for the poor.