Reuters: “The U.S. Supreme Court on Tuesday considers three blockbuster cases concerning efforts by the Democratic-led House of Representatives and a grand jury working with a prosecutor in New York City to obtain copies of President Donald Trump’s financial records.  Unlike recent presidents, Trump has refused to disclose his tax returns and other materials that would shed light on the scope of his wealth and his family-run real estate business. The cases test the limits of presidential power in relation to Congress and state prosecutors. Here is a look at what is at stake in the cases…”