Uhh, he never campaigned for a single payer model.
> In the 2008 Obama-Biden health care plan on the campaign’s website, candidate Obama promised that “any American will have the opportunity to enroll in [a] new public plan.”
[0]https://thinkprogress.org/flashback-obama-repeatedly-touted-...
https://www.politifact.com/truth-o-meter/statements/2009/jul...