I notice part of the issue with the visit of Chinese President Xi is that he's staying right in Downtown Seattle in a location that cannot be readily secured.
I have been following the tweets & Facebook posts of the Seattle media & where he is staying is a logistical nightmare. Considering the proximity to both Westlake Center & Pacific Place.
Here's a post from the Seattle Center Monorail:
"September 22 and 23, 2015: Because of a dignitary security concern, Seattle Center Monorail will operate with reduced service on Tuesday and Wednesday. The Monorail will depart from Westlake Center Station every 15 minutes. For example, the Monorail will depart at 7:30am, 7:45am, 8am, 8:15am, etc. The Monorail will operate from 7:30am-11:00pm. Passengers can expect to see a police presence at both Monorail Stations and police officers will be checking bags prior to passengers boarding the trains."
Also noticed the following: King County Metro Transit Alert
From what I've seen/read, they are using some form of Executive Powers/Orders to create the security zone, with little regard to those who live/work in that area.