Earlier quoted context omitted.
Parent's point is that your Oregonian congressman is not looking out for your interests but those of his resident-constituents. If emigrants comprise a population roughly equivalent to Maryland, why don't they get their own representation?
Some countries reserve parliament seats for representatives of citizens abroad: http://en.wikipedia.org/wiki/Overseas_constituency
Apparently even in the US the Democratic National Convention gives state-level recognition to Democrats Abroad, an organization for overseas Democrat voters.