I believe that is a union bug. Democrats typically take their printing to a union shop. Check campaign materials.
http://images.google.com/images?sourceid=navclient&rlz=1T4ADBF_enUS296US299&q=union+bug&um=1&ie=UTF-8&ei=rjysSsGuCpOANvez5fIN&sa=X&oi=image_result_group&ct=title&resnum=1
Very good! Thank you!
The “union bugs” in the first document and the second document don’t seem to be the same.