cnn's drew griffin investigates. >> elaine chao oversees shipping in the united states which is the industry that has made elaine chao rich. her family's company, now run by her sister angela is a global leader in dry bulk shipping and does major business in china, which is why cha o's use of her office to put her family and business on display is raising more than a few eyebrows. >> she has attempted to use, and she has used government office to help her father and his business. >> in 2017, elaine chao used the department of transportation as a backdrop for multiple interviews with chinese and chinese language media like this one, her father at her side. and showing off the lapel pin he received flying on air force one. >> my father and i traveled on air force one. that's always an experience and i was so pleased that i was able