What theme does the following excerpt from franz kafka’s the metamorphosis deal with?

his face was as red as an

from the political point of view it could be said that the candidate   is an effective speaker because she takes a strong position on the issue. it is an open discussion but probably she is making a presentation and can choose which subjects she wants to address. she is very likely to attain her aim which is to convince voters to accept her proposal.

what is margin again? i’m confusion