A new Issue Brief from the Commonwealth Fund estimates Medicaid expenditures under current law on a state-by-state basis and compares them to funding available under a block grant. States that take up the block grant would see substantial reductions in Medicaid funding.
The Brief can be obtained at https://www.commonwealthfund.org/sites/default/files/2020-03/Mann_fiscal_impact_Medicaid_block_grants_ib.pdf.