As President Trump issues executive orders that encroach on the powers of Congress — and in some cases fly in the face of established law — a debate has begun about whether he’s merely testing the boundaries of his power or triggering a full-blown constitutional crisis.Adam Liptak, who covers the Supreme Court for The Times, walks us through the debate.Guests: Adam Liptak, who covers the Supreme Court and writes Sidebar, a column on legal developments, for The New York Times.Background reading: