We know how groups vote, the democrats won the Protestant vote by narrow margins in 1932 and 1936, and won it again, and for the final time, in 1964.
The republicans have only won the Catholic vote 4 or 5 times, depending on the source. FDR for instance was beloved by Catholics winning their vote by 85%, 81% 73% and again 73% in 1944.
Here is how National Review lists the Catholic vote.
Percentage of Catholic Vote for Presidential Winners
1952: Eisenhower, 44%
1956: Eisenhower, 49%
1960: Kennedy, 78%
1964: Johnson, 76%
1968: Nixon, 33%
1972: Nixon, 52%
1976: Carter, 57%
1980: Reagan, 47%
1984: Reagan, 61%
1988: Bush, 49%
1992: Clinton, 47%
1996: Clinton, 55%
2000: Bush, 46%
2004: Bush, 48%
2008: Obama, 53%
“We know how groups vote”
We have a secret ballot, and therefore do not know how groups vote.
We have self-reporting by a self-selected sample, and I find it hard to think of anything less reliable.
Even if we accept your numbers, though, we still see substantial numbers voting against republicans.
Source, please.
Where’s 2012?
It seems like Catholics do MUCH better at voting for a Presidents SECOND term...