' rather than mythology, provides' = Mythology does not provide the explanation. American politics does. ' representative ' = an elected official ' to put those speeches in the record out of loyalty to his supports ('supporters') at home ' = "The Congressional Record" is the official document that preserves an account of the daily proceedings, an account-- accessible to the public-- which can be quoted from by anyone for a variety of political purposes.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.