The owner of TikTok has chosen Oracle over Microsoft as its preferred suitor to buy the popular video-sharing app, according to a source familiar with the deal who was not authorized to speak publicly about it. Microsoft announced Sunday that its bid to buy TikTok has been rejected, removing a leading suitor for the Chinese-owned app a week before President Donald Trump promises to follow through with a plan to ban it in the U.S. The Trump administration has threatened to ban TikTok by Sept.