Any immigration package in which current illegal immigrants are made eligible for Obamacare — in the form of either exchanges or Medicaid — could increase costs to the federal government by between $120 billion to $200 billion in its first decade

This estimates assumes that the law’s provision capping total spending on exchange subsidies, which is set to begin in 2019, is enforced. However, should the provision fall by the wayside, as some analysts believe it could, it is estimated that the cost of Obamacare could increase between $210 billion to $300 billion over the next 10 years.