In don't think it sounds kooky at all. I think not thinking of everything possibilty or reason is kooky. We are dealing with kooks therefore we must think like kooks. Any scenario, even if it seems kooky, is worth thinking about and putting out there for other opinions. Look at me I post my kooky dreams. But seriously, I think you did a good job.
Thanks for your encouragement. This is a premonitions that smacked me in the face today, and I can't shake it because of the recent assassination threats. After seeing Portland on the map, it looks like a tricky place to secure because of it's proximity to the border and Vancouver specifically. The fact that the president's father coined the name "Little Beirut" really jumped out at me too.