a series of `||` are kinda stinky and make it tricky to debug.

Maybe we can stuff all the matchers into an array and return the first match that we find within our document.

```ruby
# Top of usps.rb
STATUS_NODE_PATTERNS = %w(*/*/TrackSummary Error/Description */TrackInfo/Error/Description)

# refactor of response_status_node
def response_status_node(document)
  STATUS_NODE_PATTERNS.each do |pattern|
    node = document.elements(pattern)
    return node if node # Or something similar
  end
end
```