Why was the chicken thrown under the bus?

Politics of course.  If it wasn't so tragic, so maddening- no; infuriating, it would be funny to watch the politicians flip and flop like fish out of water.  But for reasons I simply cannot grasp, people pay attention to what the flopping fish say.  I know my morals have not "evolved" in the last three years, but obviously the flopping fish have.  Or not?  Isn't it more likely that they privately held that position all along and just claimed to be morally 'straight' to get elected?  So what, eh?  Pols lie all the time.  Stupid fish.