WASHINGTON (Reuters) - TikTok, owned by China's ByteDance, should be removed from app stores run by Apple Inc and Alphabet's Google because the short video social media app poses a risk to national security, Senator Michael Bennet, a Democrat on the intelligence committee, said in a letter dated Thursday. In 2020, then-President Donald Trump attempted to block new users from downloading TikTok and ban other transactions that would have effectively prevented TikTok's use in the United States, but the move was rebuffed by the courts. TikTok Chief Executive Shou Zi Chew is due to appear before the U