The Catholic church doesn’t consider Mormons Christians, no Christian church does, not the Catholics, the Methodists, the Southern baptists, the Orthodox, the Presbyterians, none.
Mormonism is a religion of it’s own, a polytheistic religion with countless numbers of Gods, Reid, Romney and Beck are all Temple Mormons and are aspiring to become Gods some day with many wives and their own planet of worshipers.
Remember that the Mormon bible that Joseph Smith wrote, the “Book of Mormon” is greater than the Bible, in Mormonism.
After you die, they will baptist you into Mormonism anyway, just like they did Pope John Paul II and all Popes and Hitler, and Anne Frank, and probably Ronald Reagan by now, it is what they do.
That is a question which typically ends up being answered by a consideration of “well, what does some kind of average of their professed doctrines look like.”
Which is a fallacy. It is the Lord that makes Christians Christian. No demon, no idol, can overpower the Lord. However their presence in a situation that moves the Lord to jealousy can result in distinctly painful situations.