Here’s the latest long-term chart from the Kaiser Family Foundation showing the net approval of Obamacare:

Now that we have a fairly long data series, it’s clear what was needed in order to make Obamacare popular: a threat to take it away. Seriously. If Mitch McConnell makes good on his threat to try to repeal Obamacare yet again next year, I expect it will gain another five or ten points in popularity.