CHEYENNE, Wyo. (AP) — The Wyoming State Senate has pushed back a final vote on whether to expand the federal Medicaid system.

The Senate voted Thursday to delay action on a bill to expand Medicaid to offer insurance coverage to some 17,600 low-income adults until Friday.

Gillette Republican Sen. Michael Von Flatern is sponsoring the bill. He hopes to roll back an amendment to require plan participants to work at least 32 hours a week that he says federal regulators likely wouldn't accept.

Von Flatern also wants to strip an amendment to prohibit the Wyoming State Health Department from transferring savings it could realize in other programs to support Medicaid expansion.

Many senators say they mistrust federal promises to cover future expansion costs. Medicaid expansion is an element of the federal Affordable Care Act.

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