CAMEROTA: Nikki Haley making a surprise announcement that she is leaving her post as U.S. ambassador to the United Nations at the end of the year. She says it's because it's time for someone fresh to take over.</s>NIKKI HALEY, OUTGOING U.S. AMBASSADOR TO U.N.: There's no personal reasons. I think that it's just very important for government officials to understand when it's time to step aside. And I have given everything I've got these last eight years and I do think that sometimes it's good to rotate in other people who can put that same energy and power into it.</s>CAMEROTA: All right. Joining us now to discuss, we have CNN senior political analyst John Avlon and former White House communications director for the Obama administration and CNN political commentator, Jen Psaki. Great to have both of you. So Jen, is -- there's all sorts of speculation about whether there's a back story here. Can it be as simple as she's just out of gas, and it's that easy?</s>JEN PSAKI, CNN POLITICAL COMMENTATOR: You know, Alisyn, it sure does seem like something --
Nikki Haley Resigns as U.N. Ambassador.