President Trump’s legal team sent a letter to Special Counsel Robert Mueller in January outlining many reasons why the president should not sit down for an interview. Fox News has obtained the letter, which offers a detailed look at the president’s legal team and its thinking about whether he should submit to an interview, including the argument that under the law and the U.S. Constitution, Mueller faces a high bar in trying to prove he needs in-person answers from the president. Trump attorney Jay Sekulow and then-Trump attorney John Dowd challenged Mueller to prove there were questions remaining that had...