The New York Times: “President Trump’s lawyers have for months quietly waged a campaign to keep the special counsel from trying to force him to answer questions in the investigation into whether he obstructed justice, asserting that he cannot be compelled to testify and arguing in a confidential letter that he could not possibly have committed obstruction because he has unfettered authority over all federal investigations. In a brash assertion of presidential power, the 20-page letter — sent to the special counsel, Robert S. Mueller III, and obtained by The New York Times — contends that the president cannot illegally obstruct any aspect of the investigation into Russia’s election meddling because the Constitution empowers him to, “if he wished, terminate the inquiry, or even exercise his power to pardon.” [Read the Trump lawyers’ confidential memo to Mr. Mueller here.] Mr. Trump’s lawyers fear that if he answers questions, either voluntarily or in front of a grand jury, he risks exposing himself to accusations of lying to investigators, a potential crime or impeachable offense. Mr. Trump’s broad interpretation of executive authority is novel and is likely to be tested if a court battle ensues over whether he could be ordered to answer questions. It is unclear how that fight, should the case reach that point, would play out. A spokesman for Mr. Mueller declined to comment.

“We don’t know what the law is on the intersection between the obstruction statutes and the president exercising his constitutional power to supervise an investigation in the Justice Department,” said Jack Goldsmith, a Harvard Law School professor who oversaw the Justice Department’s Office of Legal Counsel during the Bush administration. “It’s an open question.”