Tagg Romney and his parents. (Melina Mara/Washington Post)

Two new profiles highlight Mitt Romney's eldest son Tagg as an important adviser who sometimes protects his father from his own campaign. 

National Review: "On paper, he doesn’t have a title beyond “surrogate,” but outside of Ann Romney, there is no one in the family who has greater influence and sway."

BuzzFeed: "Tagg ... sees his task as keeping the endless drone of advisers and pundits from drowning out his father's own better angels."

Politico reported Monday that Tagg was part of a family "rebellion" against professional campaign staff. Romney's team has disputed that account.