(CNN) Idaho voters approved Medicaid expansion in the fall, but Republican state lawmakers are now trying to add several restrictions to it.

The move follows similar action in Utah last month, where GOP lawmakers approved legislation limiting the scope of a measure also passed in November's midterms. Voters in a total of four states have turned to the ballot box to get around Republican lawmakers who've refused to adopt the Obamacare provision expanding Medicaid.

Idaho's legislature is considering a bill that would mandate certain newly eligible enrollees to work 120 hours a month to maintain their benefits, far higher than most state work requirement proposals.

The bill would also direct the state health department to ask participants about drug use so they can be referred to treatment. And it seeks to allow those just above the poverty line to get federal subsidies to purchase private coverage on the Obamacare exchange.

Under the bill, the Medicaid expansion would be eliminated entirely if federal reimbursement ever falls below 90% of the program cost.

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