This week is the busiest week of the year for the US Postal Service. Despite all the business, the postal service is on the verge of bankruptcy because of a pre-funding mandate imposed by a lame-duck Congress in 2006. 

Here in Portland, a door-to-door canvassing group called Working America is taking up the cause of saving America's postal service. 

KBOO's Jamie Partridge has more on this story.