From a friend who follows these things closely:
The worst part of the debate and the part that I wish Ryan had been able to counter was when Biden started in on the “They don’t have a bomb to put (the fissile material ) into.
This is outrageous. The hard part of building a nuclear weapon is to get the fissile material, bomb designs are a dime a dozen and anyone who has access to a copy of the Progressive Magazine from the 1970s when they published a bomb design they had dug up from some documents that were found in the Los Alamos public library can build one.
The A.Q, Khan design has long been available to then including any refinements the North Koreans have made.
Making a warhead that can fit on a missile may be harder, but building a basic nuclear weapon that could be put on an airliner or a ship is easy once you have the material….