Vatican urges action on climate change
bbc.co.uk
bbc.co.uk
Although as the article says: "Whether it will prove persuasive for American Republican lawmakers - around a third of whom are Catholic - is yet to be seen."
The actual statement is here: http://www.casinapioiv.va/content/accademia/en/events/2014/s...
Alternative article: http://www.nytimes.com/2015/04/28/world/europe/pope-francis-...
Made men in the Mafia don't care about the church's teachings about murder. The catholics in Northern Ireland didn't, either.
American politicians defend the death penalty against the Pope speaking out against it (although in this case you can claim that "Render unto Caesar" is a valid rebuttal).
So don't hold your breath.