Asked if he would agree to be interviewed by Robert Mueller's team, President Donald Trump told the White House press corps, "I would love to do it ... as soon as possible. ... under oath, absolutely." On hearing this, the special counsel's office must have looked like the Eagles' locker room after the 38-7 rout of the Vikings put them in the Super Bowl. If the president's legal team lets Trump sit for hours answering Mueller's agents, they should be disbarred for malpractice. For what Mueller is running here is not, as Trump suggests, a "witch hunt." It is a...