A report from the RAND Corporation discusses the likely impact of repealing or revising the Affordable Care Act. The focus includes: maintaining the ACA with no changes, repealing the law with no replacement, replacing the law with a single payer system, and replacing the law with other measures that address coverage expansions through Medicaid and the individual market.
The report can be obtained at https://www.rand.org/health/key-topics/health-policy/in-depth.html.