From Semafor:
The closely watched effort by a club of Senate moderates to craft a bipartisan Social Security reform plan may be stalling out for the foreseeable future. ...
No Democrats so far are willing to sign on as original co-sponsors of a potential final proposal, despite the fact that Sens. Tim Kaine of Virginia, D-Va., and Kyrsten Sinema, another independent who caucuses with Democrats, form part of the bipartisan gang. Both are up for re-election in 2024. ...
And no Republican would have been a sponsor for a bill that increases taxes so the whole thing was a waste of time. Nobody in Congress is willing to admit they favor a "bipartisan" approach. Nobody.