That is completely false. Obama got 19 million Catholic votes from a population of over 68 million. That is 27%, not 54%.
You ought to be more concerned about the 50 million non-Catholic votes cast for Obama than trying to mischaracterize the 50 million Catholic votes he did not receive.
Pax vobiscum
In the real world we count voters and measure what percentage of them vote in which way.
If one wants to count people that are eligible to vote but don’t bother to, I think research would show them to be even more liberal than the voters that do show up.
If all baptized Catholics voted it would probably vastly raise Obama’s percentage of 54% of the Catholic vote to something truly astronomical, we have to pray that Catholics stay home.
Well, about 40% of those over 18. And it would be interesting to know what % of priests and nuns voted for him. Probably larger than than the percent of regular churchgoers. At least if one is talking about the older ones.