This 'Anyone but...' thing is becoming an awkward trend.
Without changing OTL prior to late 1974/early 1975, who could become the Democratic nominee besides Carter? Could somebody else win? And if they did win, with a Democrat-controlled congress, could they have accomplished more? Possibly saved or at least helped the economy? Stood for a better/closer re-election in 1980? Or is the 1976 - 1981 presidential term just doomed by default?
Please bare in mind I want some detail on administration as well as nomination.