Looks like it's (almost) officially official: President Obama will nominate John Kerry to replace Hillary Clinton as secretary of state, White House officials are telling multiple media outlets this morning.
The New York Times:
The appointment of Mr. Kerry, a Massachusetts Democrat and his party’s former presidential nominee in 2004, has been widely expected since last week, when Susan E. Rice, the ambassador to the United Nations, asked Mr. Obama to withdraw her candidacy for the post.
Ms. Rice had come under weeks of attack from Republicans in Congress over her role in the aftermath of the deadly attack on the United States mission in Benghazi, Libya. Mr. Kerry, as chairman of the Senate Foreign Relations Committee, oversaw a hearing on Benghazi on Thursday, at which the State Department came under renewed criticism for its failure to respond to requests for additional security in Libya.
An official announcement could come as early as today. [Update: OK, now it's official.]