That will never happen! Never! Liberals will never, ever, ever admit they were wrong about anything, or that any bad things have happened because of what they’ve done.
What would likely happen in this case is that they’ll blame some specific politician or bureaucrat for taking their good ideas too far, or they’ll claim it was forced upon them somehow by the policies or lawmaking decisions created somewhere down the line by Republicans. 
ETA: Either that, or they’ll simply state that everybody ought to be eating broccoli anyway, and what’s wrong with the government trying to make sure that everyone is healthy?