Russell Crowe is very difficult, but it's worth it. He's the real thing. I can tell you this. Russell Crowe was just as difficult before he was an international star as he was afterwards.
The worst part was waiting around. Sometimes you are ready at 9 a.m. and you don't start until the afternoon. Occupying your time while you wait is the hardest part of the movie.
The most important aspect of the relationship between the president and the secretary of state is that they both understand who is president.