Of the whole law, or just the individual mandate? Donk Senators Joe Manchin, WV, and Kay Hagan, NC, have come out in favor of delaying the mandate.
Delaying the individual mandate would improve the law from the standpoint of the low-information pukes who vote, while making it more likely to collapse ultimately, due to adverse selection. Of course, when it collapses, the 'Rats will offer up Single Payer as the solution. That's been the plan all along.
AFAIK just the individual mandate. Is that any different than what the House bill proposes to delay? The "whole law" has been in effect for four years now and it has been funded so far and the infrastructure of the unionized bureaucracy has been under construction for four years.