ALAMO, Texas — For years, Sonia Limas would drag her daughters to the emergency room whenever they fell sick. As an illegal immigrant, she had no health insurance, and the only place she knew to seek treatment was the hospital — the most expensive setting for those covering the cost.

The family's options improved somewhat a decade ago with the expansion of community health clinics, which offered free or low-cost care with help from the federal government. But President Barack Obama's health care overhaul threatens to roll back some of those services if clinics and hospitals are overwhelmed with newly insured patients and can't afford to care for as many poor families.

To be clear, Obama's law was never intended to help Limas and an estimated 11 million illegal immigrants like her. Instead, it envisions that 32 million uninsured Americans will get access to coverage by 2019. Because that should mean fewer uninsured patients showing up at hospitals, the Obama program slashed the federal reimbursement for uncompensated care.