The Obama campaign declares checkmate.

Or words to that effect:

As we wrote last night, Obama has begun to make his own inevitablity case, and David Plouffe made it explicit on a conference call this morning, telling reporters that it's now "next to impossible" for Clinton to surpass what he says is a 136-person lead among pledged delegates.

On the one hand, this might be absolutely true. On the other hand, the first thing Obama should have learned in "running for office 101" is "Don't pull a Gingrich, dude."