It seems to me that with Palpatine, Lucas is using imagery to metaphorically suggest what Palpatine is doing, sometimes by equating him with an animal. In ROTJ, he sat with his chair right in front of that round window. Given the design of the window, he looked like a spider in the middle of a web. In Episode I, he whispered into Padme's ear from the side, like the snake tempting Eve. And in Episode II, I couldn't find any animal imagery, so I hope this doesn't sound like a stretch. The senate is a womb like environment, and the Chancellor's podium looks rather phallic. Seems appropriate then, that it is in the Senate that the Empire is born.