If states maintained ACA #Medicaid expansion coverage and spending, a per capita cap on the expansion population would erode the effective enhanced federal match rate over time and shift $246B in costs to states over 10 years.

More in our NEW @kff.org analysis here: https://www.kff.org/medicaid/issue-brief/a-medicaid-per-capita-cap-on-the-aca-expansion-population-state-by-state-estimates/