A politician is a being whose name derives from the roots "poly" (meaning many) and "tick" (meaning blood-sucking parasite). They were found on most planets, and especially Coruscant, which they infested.
They were often known to threaten those under their power with planetary destruction.
Just as Charles Darwin said that a more advanced species would totally destroy a less advanced species, politicians represent the more advanced species. Latching onto astronauts in space as parasites often proved fatal for the astronaut's home planet. In time, the politicians would evolve into bugs and arachnids and force hospitals to become quarantine centres for the very rich.