No they didn't have a guaranteed number. Regardless, it's academic.
In case you missed it,,,,nearly all the dems were for it and none of the pubs. Idiot. All we needed was one or two pubs to do the right thing.
The problem with the US is the G'dam Republican'ts.
Let's review. Essentially ALL the dems were for it, and NONE of the assholes on the right were and you want to blame to blame the dems. Take your meds.
You had the house, the Senate and the Presidency. If your party wanted to pass single payer, it would have done so, regardless of what the GOP wanted. Who is off their meds again?