Roland Martin, who has some good sources, adds useful detail that seems to put to rest the notion that Valerie Jarrett knew about Blago's maneuvering and dropped out of the running for Senate as a result.
Martin confirms that Jarrett supporters were initially putting out feelers. Then:
On November 9, while she was in New York on business, he offered her the job as senior advisor to the president and assistant to the president for intergovernmental affairs and public liaison. This position has her reporting directly to him and places her in the inner sanctum of the president of the United States, and ensures that her voice will be heard on nearly every issue.
I know the date well because on November 10, she confided in me that she had been offered the job, but I couldn't report anything until the announcement was about to be made. I had been working the phones to ascertain what jobs were being offered to a litany of Obama campaign officials, and she was certainly high on the list because of her relationship with Obama. On November 12, with speculation increasing that she was going after the job, she announced that she was not interested. And on November 14, I reported that she had been officially named to the post.
http://www.politico.com/blogs/bensmith/http://essence.typepad.com/news/2008/12/the-back-stor-1.html