The Senate parliamentarian has advised that a Republican proposal that would shift some food stamp costs from the federal government to the states would violate the chamber’s strict rules.

The cost-share plan was a critical way for Republicans to trim spending to pay for their massive reconciliation package and farm bill programs.

Senate Republicans failed to include their plan to increase state cost-sharing for the country’s largest nutrition program in their sweeping budget reconciliation bill after the Senate parliamentarian ruled it violated chamber rules.