lockheed martin corp lmt.n turn corey lewandowski donald trump former campaign manager lobby firm steer cost dispute around f-35 fighter plane company spokesman say bloomberg report thursday lockheed world large defense contractor seek lewandowski help initial discussion issue trump lockheed marillyn hewson go well lockheed retain lewandowski lobby firm spokesman william phelps tell reuters problem erupt december trump slam f-35 program expensive say intend keep push cut cost military hardware trump also target boeing tweet control cost new air force one plan seek cancellation order last month u.s. defense secretary jam mattis order cost-cutting review f-35 fighter jet boeing ba.n next-generation air force one presidential plane june trump fire lewandowski oversee campaign fundraise arm dispute advisers lewandowski help trump win republican presidential nominate contest lockheed say n't seek help trump 's ex-campaign manager