Erik has been all over the place making speeches. >> erik and ivanka. come on, they want you to walk over honey, come on. >> along with jared kushner had become the top campaign lieutenants. unusually prominent roles for family members. >> congratulations, dad, we love you! >> for much of this year, they've been their father's most effective surrogates. >> it is such an honor to be here for a man i love so, so, so, so much. >> good evening. i'm donald trump, junior. >> donald trump is the person to make america great again. >> tiffany, trump's 22 yard daughter with marla maples also took cente...