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Huntsman campaign manager quits

NBC News has confirmed that Jon Huntsman campaign manager Susie Wiles has quit the campaign, and she's being replaced by top communications aide Matt David.

Huntsman senior adviser John Weaver says in an email:

"Susie has served the campaign well and was vital in getting it off the ground in such a short time-frame. In just under three months Gov. Huntsman has returned from China, launched a campaign and created a strong infrastructure in the 3 early primary states. He's built important relationships with donors, as well as political, policy, and grassroots leaders that other candidates have been courting for half a decade."

More from Weaver: "Now the campaign is moving into phase two which will be more aggressive from a messaging and tactical standpoint and Matt is prepared to take that on."