Did Obama win Christians in Utah?

[ag]

Mormons are Christians, so no.

Not by the definition of most Christians, so he might have.

[ag]

Just because Mormons are weird and strange doesn't mean they're not Christians.

If people were excluded based on being " a strange lunacy cult", then you could exclude a lot of Christians worldwide.

Doctrinally, Mormons are about as related to Christianity as, say, Muslims or Jews (or, actually, Mormons to Christianity are what Christians are to Judaism). Culturally, and from the point of view of self-identification, of course, they are Christians.  But in terms of what they believe in, the gap with Christianity is striking.

[ag]

What about Greek and Russian Orthodox "Christians" and Unitarians (the John Adams kind)?

Greek, Russian and other Eastern Orthodox are about as Christian as Catholics. In fact, they are not even considered heretics by the Catholic church (though they, in fact, believe Catholics to be heretical). The most important doctrinal difference between the to is on the nature of the Holy Ghost (the Orthodox believe it to come from the Father, while the Catholics add "and Son"). On this the Eastern Orthodox view, in fact, has better pedigree: that's the original Nicean Creed, which Catholics have modified. Pretty much on all other matters that don't have to do w/ the role of the Bishop of Rome they are indistinguishable.

In any case, theological and historical differences betwenn Eastern (or, even, Oriental) Orthodox and most Protestant churches might be huge, but they pale in comparison between the differences between even most  evangelical churches and the Mormons. On the bulk of what they believe in Orthodox, Catholics, Anglicans, Lutherans, Baptists, etc., etc. are fairly close - while Mormons are almost as distinct from them all as are the Muslims.