TikTok told employees it will fight in the courts if a US bill forcing a ban or divestiture of the Chinese-owned app is signed into law, as one of the world’s most valuable technology businesses tries to fend off an existential crisis in its most important market.“This is an unprecedented deal worked out between the Republican Speaker and President Biden,” Michael Beckerman, TikTok’s head of public policy for the Americas, said in a memo to TikTok’s US staff. “At the stage that the bill is signe...