Im Gipper said:
He is a useful idiot at best, but in reality, nothing but an leftist, ideological hack.
The reason Iran has been going for enriching uranium is because the ease of building the actual weapon. It does not require any kind of fancy trigger or implosion system.
As soon as they hit ~90%, they can build a gun-type weapon within hours, especially if they've already assembled the rest of the non-nuclear components. The tech is so simple the United States didn't even bother to test the one we had in 1945. The "test" was when we dropped it on Hiroshima.
Heck, I could build one in my garage as long as I had enough HEU and high explosives. It is that simple and the reason why the blueprints for Little Boy aren't even classified.