It's interesting how the effects of filter bubbles are playing out here. Everyone believes that
they have the upper hand and the majority of the American people are on their side, because computerized personalization shows them only opinions from people who agree with them. As a result, they think that the negative popular opinion for the shutdown will fall primarily on the other party, and so it is rational for them to continue the shutdown until the other party blinks. Of course, the other party has the same information distortion in the opposite direction, so they
also believe that if they just keep going, the American public will blame their opponents.
In reality, the public is pretty close to split down the middle, and both parties are getting blamed, and the real message that people are taking away from this is that Congress is dysfunctional. It's a game of chicken where both parties think that the other side will blink, and so they just end up crashing.