“how exactly is he not leading overall among Catholics?”
Only about one-third of self-described Catholics attend mass every week, and only about 40% attend mass at least once during the year. Sixty-percent, therefore, attend mass only to get married and buried. My numbers are from Georgetown University, BTW. Yet they will tell pollsters they are Catholic since by the Church’s own definition, if one has been baptised Catholic, one is a Catholic. I have plenty of CINOs in my own family. They consider themselves Catholic even though they only attend mass to witness my children receiving sacraments, if then, and yes, they are Democrats. Rabid, Bush-hating, Obama-voting Democrats.
Those numbers are baloney. First, consider the source. Georgetown is a liberal, practically ex-Catholic university. Second, do you expect me to believe only 7% more attend Mass only once or a few times as opposed to the weeklies? Easily over half attend at least once a year. You underestimate the CINOs. Many may be rabid Bush-hating pro-Obama Democrats but not as many will come out for Obama when his votes come under scrutiny after the conventions.