President Donald Trump signs an executive order in the Oval Office that puts into effect his plan for the social media and video streaming platform TikTok. Most members of President Donald Trump's Cabinet are expected to launch official TikTok accounts Tuesday, a White House official confirmed to Fox News. The coordinated rollout, first reported by Axios, follows a July 16 opinion from the Justice Department's Office of Legal Counsel concluding that federal employees may use TikTok because the app is now operated by a U.S.-approved owner that falls outside the federal ban.The DOJ opinion concluded that the version of TikTok…