I think they decided that he is such an incredible piece of shit who stabs them in the back and reneges on every deal (see: his attempt on Sunday to blame the budget fiasco on them, his renging on the debt ceiling deal, his stance on J6…) that he wasn’t worth saving. Either some R’s join with D’s to make a coalition (as just called for by H. Jeffries) or the R’s have to get their shit together, painfully, for the budget. The last CR clearly showed the issue with the current R party composition. There is a wing that essentially acts as a third party spoiler. The CR was very much a win for the Dems (except for Ukraine funding, although I am of the personal opinion that a clean CR is the correct way to do a CR, fund other stuff separately).