Trump and Republican leaders have promised to repeal Obamacare, leaving millions without health insurance. Professor Colleen Grogan breaks down the benefits of the Affordable Care Act, its shortcomings, and key parts of proposed alternatives. For More on this Topic: Read her two-page fact sheet, What Trump Means for the Affordable Care Act, co-authored with Dean Sherry Glied . Check out her brief, Debunking Myths about Medicaid - And Its Expansion, with Theda Skocpol and Katherine Swartz. Further Reading: How Obamacare Repeal Would Harm Rural America, Claire Snell-Rood, University of California, Berkeley, Cathleen E. Willging, Behavioral Health Research Center of the Southwest How Obamacare Helps Americans Who Already Have Health Insurance, Jonathan Oberlander, University of North Carolina at Chapel Hill