TikTok , one of the most popular social media apps in the United States, is under severe scrutiny from the U.S. government and faces a potential ban– but how likely is it? The debate over the app rose to a new level on Thursday when TikTok CEO Shou Zi Chew made a rare public appearance as he testified in front of Congress with legislators grilling him and accusing the app of being under the control of the Chinese government and fearing the social media platform could compromise Americans’ private data.