A U.S. lawmaker is pushing for a federal investigation into GNC, the supplement retailer owned by a Chinese company, over concerns it poses a national security risk on military bases. The move comes as tensions between the U.S. and China grow, with lawmakers warning that personal data and imported ingredients could be exploited. For more context and news coverage of the most important stories of our day, click here: nbcnews.com » Subscribe to NBC News: nbcnews.to/SubscribeToNBC » Watch more NBC video: bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connec...