The Benghazi blunder torpedoed U.N. Ambassador Susan Rice's bid, and recent revelations that she has sizeable foreign oil investments linked to Iran certainly didn't help matters. From CNN, about the liberal Democrat's letter to the president: "I am highly honored to be considered by you [U.S. President Barack Obama] for appointment as Secretary of State. I am fully confident that I could serve our country ably and effectively in that role. However, if nominated, I am now convinced that the confirmation process would be lengthy, disruptive and costly - to you and to our most pressing national and international priorities. That trade-off is simply not worth it to our country."
Here's her full letter to U.S. President Barack Obama.