U.S. Federal and State Medicaid Spending: Health Policy Patterns by Political Party Leadership and Census Demographics.

Medicaid is a vital public health program, serving over 70 million Americans from many backgrounds. Understanding how Medicaid spending varies by political leadership and demographic factors can inform policy discussions and advocacy efforts. We conducted a cross-sectional descriptive analysis of state Medicaid spending using publicly available data. Our findings show that individuals identifying as White comprise the largest single racial group of Medicaid beneficiaries both nationally and in most states. While the 2020 Census Diversity Index correlated strongly with total Medicaid spending, no significant association was found with per enrollee spending or the federal share of Medicaid funding. States led by Democrats had higher total Medicaid spending when compared to Republican-led states. However, Republican-led states received a larger proportion of federal Medicaid funding. Among political leadership levels, Senate representation showed the strongest relationship with Medicaid spending trends compared to gubernatorial leadership and presidential voting history. In conclusion, we demonstrate that Medicaid spending impacts all racial groups and both major political parties. However, funding structures and political representation reflect distinct spending patterns. Given the evolving demographic and political landscape, ongoing policy discussions should ensure that Medicaid remains a public health program that remains effective at safeguarding human health.