Extreme Political Metaphors

A few stabs at a metaphor for the United States Government:
There is a long dark tunnel.  Its only wide enough for one person to pass.  After walking for nearly a day in different directions, with different destinations in mind, two people meet in the center.  They cannot pass each other. 
One says to the other “You have to go back, you are blocking my way!” The other one says to the first “No, you have to go back – you are blocking my way!”  Neither is willing to back down, so both remain standing there at the impasse, until they both die from exhaustion. 

Or:
There is a long dark tunnel.  Its only wide enough for one person to pass.  After walking for a day or more, two people meet in the center.  One says to the other “You have to go back – you are blocking my way!” The other one says to the first “No, you must go back, you are blocking my way!”  After awhile, one gets tired of waiting for the other to back down, so he takes out a baseball bat and knocks the other one out.  Then he can move on.  The other one, severely wounded, remains in the tunnel.  When he wakes up, he cannot remember which way is the right one, and eventually he dies because he can’t find his way.
Or:
There is a long dark tunnel.  Its only wide enough for one person to pass.  After walking a week or better, two people meet in the center.  One says to the other: “ If we both turn to the side, and slide past, we can both continue on to our destinations!” The other, being a rational man, agrees.  When they have traded places, one offers the other water.  They drink.  The other offers the first a bit of bread and fruit.  They shake hands.  Happily, they both continue on to their individual destinations.  
Or:
A man is walking in a tunnel.  It is a very long and dark tunnel. Behind him walks another man.  Near the mid point of the tunnel, the two hear footsteps coming towards them from the other direction.  The first man says to the second:  don’t worry.  He takes out a weapon and fills the tunnel in front of him with fire.  The footsteps in the other direction cease. The two move forward in the tunnel, where they find the cooked body of the one who was walking the other way.  Together, they feast on his body.
 
Or?