You should read this Incidental Economist post by smart people Nicholas Bagley and Adrianna McIntyre, who have found a long list of actions the Trump administration can take on its own to dismantle Obamacare, depending on how much it's willing to set the individual market on fire. A few of the highlights:

• Grant more waivers from the individual mandate
• Trim back the law's "essential benefits"
• Stop giving cost-sharing payments to insurers
• Allow states to impose work requirements, charge premiums for Medicaid
• Delay enforcement of the health insurer, pharmaceutical, and medical device taxes
• Loosen the rules for state Obamacare waivers