A priest in South Carolina has informed his flock of the consequences of casting a vote for a known poor-(pro-)choice candidate in the recent election.
Remember, one of the duties of a priest is to educate the faithful. And if the faithful choose to ignore this instruction (WARNING: PDF file), perhaps his letter is warranted.
UPDATE: I have chosen to replace the USCCB's "Faithful Citizenship" with Catholic Answer's "Voter's Guide For Serious Catholic". It seems the bishops' document has a somewhat unfavorable reaction in the 'blogosphere.