WASHINGTON — TikTok on Monday asked the Supreme Court to block a law that could potentially ban the video-based social media app, which has millions of American users.At issue is a bipartisan measure passed by Congress and signed into law by President Joe Biden that would go into effect on Jan. 19, the day before President-elect Donald Trump takes office, unless the justices intervene.The law, called the Protecting Americans from Foreign Adversary Controlled Applications Act, would require TikTo...