Aldrich later claimed "From the time we started to the time we finished the picture, I'd say fifty, sixty percent of it script was changed. Alan Sharp, the writer, was very amenable and terribly helpful. And terribly prolific. He can write twenty-five pages a day. He couldn't agree more with my political viewpoint—so that was no problem. And fortunately, Lancaster and I felt pretty much the same about the picture. It was good that I had support from Sharp and Lancaster, because I don't have the highest regard for Carter DeHaven, the producer."