Trump's tax return case could alter the US presidency forever

After years of political wrangling and multi-front litigation, the Supreme Court will hear oral arguments Tuesday on the battle over President Donald Trump's tax returns. The stakes are enormous. The court will decide by the end of its current term not only whether Trump's tax returns ever see light of day, but also whether the President stands so far above the law that he cannot meaningfully be held accountable to other branches of government and the American public.