You might not believe it, but ISTR that the Oxford PPE course includes that...
I'm going on 2nd hand information there (I did history), but I am 99% certain that this was the sort of thing that legions of eager PPE students, most of them without the first thought of going into politics, were earnestly lectured about in both the politics and philosophy parts of the degree.
Of course, since one doesn't (didn't) actually have to turn up to any of the lectures at Oxford for the non-science subjects, and can (could) get away with it via listening in tutorials and reading fairly widely, you can drop the lectures for the political networking which'll get you onto the parliamentary candidates list ...