Among all self-identified Catholic voters in today's PA primary, 63% voted for Hillary Clinton, 32% for Barack Obama. Among religiously-active Catholics the numbers are stronger, 71% Clinton, 28% Obama. 

Another surprising number is that Catholics constituted only 17% of the vote.  That number is much lower than the 29% that was expected.  

Though exit polling can change overnight, Obama continues to have a serious problem with Catholic voters.  The Sen. Casey endorsement did not offset the pattern that had developed throughout the earlier primaries.