premise: In British politics, the shadow foreign secretary is a position within the opposition's shadow cabinet that deals mainly with issues surrounding the Foreign Office. If elected, the person designated as shadow foreign secretary may be slated to serve as the new Foreign Secretary.
hypothesis: British politics involve different positions than American politics.
reason: American politics doesn't have a "shadow foreign secretary" position, while British politics does. Therefore, they have different positions. It may have been difficult because it requires outside knowledge. 