So I'm hearing.
UPDATE: NBC is confirming. NPR has it.
Here's what I wrote about this a little while back:
But, should a Supreme Court vacancy come up - which is more likely than not to happen a few times over the next 8 years - you must nominate a competent, well qualified liberal to the bench. We have to live for likely several decades with the George W. Bush picks of John Roberts and Samuel Alito, and anything less than an ideological counterweight to those two would be an extraordinary mess.