This article is a perfect example of the "false balance" that the media passes off as journalism. It equates the two parties as doing the same things, when in reality, this is simply not the case.
This stems from people's intuitive desire to see balance and fairness - even where none actually exists.
"Unswerving conservatives and liberals dominate the two parties' nominating processes, electing lawmakers who pledge never to stray from their ideologies.
This just plain false. Had this writer put down his crayons and looked for some facts, he would have seen that one party is consistently open to compromise, while the other seeks blatant partisan hegemony.