NEW : Gergen : `` It feeds into this narrative that he 's a bully '' NEW : King : ` He is not. Top aides to Gov . Chris Christie communicate about lane closures to George Washington Bridge . Christie says he knew nothing about what transpired ; mayor says e-mails raise credibility questions .
NEW : Gergen : `` It feeds into this narrative that he 's a bully '' NEW : King : `` If that perception starts to stick in , that 's not a presidential temperament '' Top aides to Gov . Chris Christie communicate about lane closures to George Washington Bridge . Christie says he knew nothing about what transpired ; mayor says e-mails raise credibility questions .