Because the replacement body is doing a really, really poor job and wrecking the TPM brand. WKJM -- readers, I'm not making this up -- trots out a Harvard sociologist to defend Obama against charges of elitism _{MR SUBLIMINAL Haw! I almost spilled my latte!} It seems that Theda Skocpol, in the extremely spontaneous fashion so characteristic of TPM's "reader writes" shtick, threw some mail over the TPM transom, and WKJM printed it! _{WKJM Memo to self: Invoice Axelrod.} Hilarity ensues! I'll excerpt the high points:

... absolutely over the top ... smash Obama ... pretending ... lurid publicity ... claws her way to the nomination ... over-the-top crudity ... _{MR SUBLIMINAL Haw! Sure you didn't mean crudité?} ... desperately wants the nomination ... We all know that.

What you mean, "we"?

And now, the best part of all. Wait for the rhetorical question: