A deal to bring TikTok's U.S. platform under American ownership is done and should be signed soon, with domestic control of the app's crown-jewel algorithm, White House press secretary Karoline Leavitt said Saturday.Why it matters: While the White House said Friday a deal was done, Chinese officials gave mixed messages, and the app's fate was left uncertain.Congress passed a ban last year with bipartisan support, but President Trump has repeatedly ordered his administration not to enforce the la...