Where do they find these people --David Wu

Just when the Weiner mess was receding into memory, we hear of another Congressman who cannot seem to act appropriately. David Wu, Democrat of Oregon, has admitted to having a sexual relationship with the daughter of a friend and supporter of his. The woman in question says that Wu forced himself upon her, while the Congressman says the relations were consensual. The woman in question just graduated from high school, so she is not underage, although the idea of an 18 year old willingly hooking up with a 54 year old congressman does not seem too likely. Wu, of course, is the Democrat who had his senior staff quit last February on the grounds that he was mentally unstable and needed help. Wu also admitted at that point to an addiction to pills.

So, we have a mentally unstable, addict and possible rapist representing Oregon in Congress. Was Jack the Ripper unavailable? Where do they find these people?