Sentence:  What Sam Rayburn 's life proves to us all is the magnificent lesson in political science that one can devotedly and with absolute dedication <WSD>represent</WSD> the seemingly provincial interests of one 's own community , one 's own district , one 's own State , and by that help himself represent even better the sweep and scope of the problems of this the greatest nation of all time . 
Meaning of the word marked with <WSD> tags:  be a delegate or spokesperson for; represent somebody's interest or be a proxy or substitute for, as of politicians and office holders representing their constituents, or of a tenant representing other tenants in a housing dispute