Trailhead: A campaign blog.

"Hillary Deathwatch" Odds: 1.8 Percent

Endorsements from formerly coy John Edwards and the United Steelworkers for Obama are two more nails in the Clinton coffin. Clinton's odds drop 1.1 to 1.8 percent.

Whatever momentum Clinton picked up from her 41-point West Virginia win the Obama camp snuffed out with the Edwards coup de grâce. Edwards sat on his endorsement until long after its game-changing power expired, so the damage to Clinton's flicker of a campaign is more symbolic than anything. The crux of his "everyone's doing it" speech last night in Michigan was that he was mimicking the will of the voters. Because he waited, Edwards' decision to finally choose a horse reinforces the "it's over" story line. Watch this narrative get another boost next week when Obama clinches the pledged delegate lead for good. (He'll hit a majority of the 3,254 pledged delegates even if he narrowly loses Oregon.)

Read more at the Hillary Deathwatch.