Why does he need to know? The Speaker of The House surely does not know what is in the Constitution, nor do most of the members. Remember when the GOP took back the House and they were going to require all new member to attend a class on the Constitution? Remember they also were going to require that all new revenue bills had to include the Constitutional Authority for any request for money?
Remember also when Paul Ryan declared it would be Unconstitutional for the US to bar Muslim immigrants, when in fact Congress had passed a law that not only allowed that but required that religion, race and origin be included in refugee status consideration.
Congress and the Senate pass multi thousand page bills on a regular basis that no one has read. Why would one be surprised that they know very little of the Constitution or the restrictions it places on them.
The president is the only person that the entire country votes for. He has a special role in that we have in our great Charter the means by which we are ruled for our own individual interests, not as a conglomeration. That is why when Ronald Reagan spoke to us over the heads of Congress, he was actually doing his God-given role as the American people's leader.
What our Founders feared was to have the voice of the people stepped on and the connection between the people and the president breached. Obama has abused his role terribly.
Whoever becomes president must realize the unique and special role. This role cannot be faked because the people will always know when they are being hood-winked and bought off.
When we are given the chance to vote for someone like Ronald Reagan we will always vote accordingly as we gave him a landslide. Twice.
Some tend to think that Reagan was just a smooth-talker, a great actor. But he understood his special role as president more than anyone since Lincoln and Coolidge.
So, it doesn't matter what the Speaker of the House knows or doesn't know about the Constitution. It would be great if they all took the time to study it correctly. But if we have the president, the Capstone of the Constitution, understand it then we will fare well as a people.