According to Brian Darling at RedState, the Congressional Democrats have one last "nuclear option" they could use to pass ObamaCare.
His conclusion:
Conservatives need to be wary that the liberals are not done trying to pass ObamaCare. This may be a desperate last ditch effort to pass President Obama's signature item of his first two year, so be ready for this scenario to play out after the summit, if the summit does not bear any fruit. For those of you that thought ObamaCare had been laid to rest, remember that it is not over.Again, I can't vouch for the reliability of the analysis, since much of this depends on backroom deals that by their very nature will not be accessible to most of the general public.