The Financial Times reports on the Rebellion that Threatens to Split Italy's Democratic Party.
Eurointelligence goes one further and suggests it's a done deal, not just a threat.
The immediate impact would be a loss of 6 percentage points, or more, support for PD, putting Beppe Grillo's Five Star Movement solidly in the lead.
In national polls, the PD is only slightly ahead of the Five Star Movement, an anti-establishment party which has called for a referendum on the euro. Any PD defection could make the difference in the next Italian general election, due within a year at the latest.