The Pewsitter Petition on Canon 915
(from my friend and canon lawyer Ed Peters)
Pewsitter.com has published an on-line petition by which Catholics may call upon bishops to withhold holy Communion from Catholic political figures who gravely disregard Church teaching on certain fundamental life issues. The petition invokes canon law in support of some of its propositions. I know nothing about the organization behind the petition, but I feel confident in commenting on its canonical aspects.
My analysis is found here: http://www.canonlaw.info/2009/02/pewsitter-petition-on-canon-915.html