The Democrats in the Congress on the payroll of the healthcare industry have taken a leaf from the Republican book.  

They will 'demand' single-payer knowing that it won't happen, but that it plays to their base.

Republicans in Congress taught them that play when they whined 'Repeal and Replace' for six years, knowing full well that Obama would veto any such thing.  Their base loved it!

Now the Republicans can't do either a 'repeal' or a 'replace' and so Obamacare will just have to go down in flames under the terms Pelosi and Reid defined for it instead.