Trailhead: A campaign blog.

"Hillary Deathwatch" Odds: 9.0 Percent

The mortar in Clinton machine's bulwark, once thought to be indestructible, continues to crumble as a once-faithful supporter hints that he might defect. Plus, more good fundraising news for the Obama camp brings Clinton to an even 9.0 percent chance of survival.

On the face of it, New Jersey Gov. Jon Corzine's statement this morning on CNBC that he reserves the right to defect if Clinton loses the popular vote sounds more inside baseball than headline news. But consider these factors: Corzine endorsed Clinton more than a year ago as part of Clinton's initial sweep of superdelegates. (Yesterday was the anniversary of that announcement.) A defection by Corzine would mean the foundation is crumbling. Also, Clinton won the New Jersey primary by 11 points on Feb. 5. Jersey is in her backyard, and the fact that the governor would consider siding with the popular vote over the overwhelming opinion of his constituents won't go overlooked by other superdelegates from states she won. If Richardson is "Judas," what would that make Corzine?

Read more at the Hillary Clinton Deathwatch.