Via the New York Times:
Lawyers for President Trump have advised him against sitting down for a wide-ranging interview with the special counsel, Robert S. Mueller III, according to four people briefed on the matter, raising the specter of a monthslong court battle over whether the president must answer questions under oath.
His lawyers are concerned that the president, who has a history of making false statements and contradicting himself, could be charged with lying to investigators. Their stance puts them at odds with Mr. Trump, who has said publicly and privately that he is eager to speak with Mr. Mueller as part of the investigation into possible ties between his associates and Russia’s election interference, and whether he obstructed justice.
Yeah, if I were Trump’s lawyers I wouldn’t want him to testify under oath either. He can’t order lunch without lying or contradicting himself, and while that may make him liable to be charged with perjury, the lawyers could be disbarred for suborning perjury by the mere act of advising him to testify. They have to be thinking of their own careers, too. (Of course, if you allowed yourself to take on Trump as a client, you have to wonder about your own fealty to the canon of ethics.)
Mueller could subpoena Trump in order to force him to testify, and he would fight it, but chances are very good that he’d lose. And while that might guarantee you years of billable hours, there’s no good outcome for your client, and with his track record with people who’ve worked for him, you’d end up getting stiffed.