LINCOLN, Neb. — A new study estimates Nebraska would forgo hundreds of millions of dollars — $738 million in the year 2022 — by not expanding Medicaid because the state’s residents will still have to pay federal taxes to support the massive expansion of the government program for the poor.

Expanding Medicaid to more low-income people is a key provision of the Affordable Care Act, or Obamacare, but last year the U.S. Supreme Court ruled states don’t have to participate. Nebraska is among 20 states that have so far opted out.

But Nebraska lawmakers — including some Republicans — haven’t given up, and plan to push the issue for the third legislative session in a row.