I had the same question about the definition of Catholic used in this poll.  Did the poll survey only the "pay, pray, and obey" Catholics (tending towards an older demographic) who regularly go to Mass on Sundays and consider abortion their top voting issue?  Or those that self-identify as Catholic because they were raised Catholic (tending towards a younger demographic), probably only go to Church on Christmas and Easter with their parents, and consider social justice their top voting issue?

It would be interesting to see how the results of this poll would look if subdivided to reflect the voting choices of these two distinctly different groups of self-identifying Catholic voters.  Based upon observations within my parish, family, and circle of friends, the latter group appears to be growing while the former group is declining.