In our system of representative democracy there is always tension in their roles as both representatives and leaders. The above paragraph is unfortunately pure obfuscatory nonsense and doesn't add any illumination at all as to the congressman's role and how he views it.
I also wish our culture could put to lie the notion of public "service", regardless of what team they are on or what position they hold. They are performing a "public service" same as anyone who does any job. They just happen to get compensated more with power and benefits more than straight up salary.