https://www.reuters.com/article/us-usa-trump-tiktok/trump-administration-studying-national-security-risks-of-tiktok-other-apps-idUSKCN24G36W >U.S. President Donald Trump's administration is studying the national security risks of social media applications, including TikTok and WeChat, that they say may risk allowing a foreign adversary to amass information on Americans, a White House official said on Wednesday.