This is a primary reason that mormons aren't Christian.
The Nature of God
According to Mormon theology, in Doctrines and Covenants 130:22, "The Father has a body of flesh and bones as tangible as man's; the Son also".
According to Doctrines and Covenants section 93, man was co-eternal with God in the beginning. In 1844, Joseph Smith began teaching that the Book of Abraham teaches that God is but one link in an infinite ancestral chain of Gods stretching back through eternity. God is only one of innumerable Gods.
The Church believes that humans are the literal offspring of God and one of his celestial wives, and because of this we all have the potential to achieve exaltation to divine status.
Smith taught beginning in 1844 that God had a literal father, and that father had a literal father, and so on.
Mormons also teach that we existed in heaven with God (our literal Father) as spirits before we became human.
According to the Bible, Jesus teaches us that God is a spirit.
Man was not co-eternal with God. Jesus created man.
God did not procreate with celestial wives.
You state: " I believe in Jesus Christ, that He is the Son of God, that He died for our sins, He was resurrected, and only through Him can we be saved.
As a former mormon, I ask you do you really believe that "only through Him can we be saved"? If you believe that, what is the purpose of the temple rituals? Mormonism dictates that in order to reach "exaltation", (that is the mormon term for salvation in the Christian sense) you must obey all the rules of the mormon church in order to "be endowed" in the mormon temple, and ONLY those who are baptized and confirmed as members are eligible to be thus endowed and enter the "celestial" kingdom. Christianity has no such requirements.
That puts man and man's laws between you and the "only through Him can we be saved" Christ.
And, don't forget this proclamation by Brigham Young:
no man in this dispensation will enter the courts of heaven, without the approbation of the Prophet Joseph Smith, Jun.
Who has made this so?
Have I?
Have this people?
Have the world?
No; but the Lord Jehovah has decreed it.
If I ever pass into the heavenly courts, it will be by the consent of the Prophet Joseph.
If you ever pass through the gates into the Holy City, you will do so upon his certificate that you are worthy to pass.
Can you pass without his inspection?
No; neither can any person in this dispensation, which is the dispensation of the fulness of times.
In this generation, and in all the generations that are to come, everyone will have to undergo the scrutiny of this Prophet.
They say that they killed Joseph, and they will yet come with their hats under their arms and bend to him; but what good will it do them, unless they repent?
They can come in a certain way and find favor, but will they?
"If I ever pass into heavenly courts, it will be by the consent of Prophet Joseph"
--Brigham Young
--JOURNAL OF DISCOURSES, vol. 8, p. 224
That pretty much blows the "only through Him will we be saved" argument.
Now, you will hear that "we REALLY don't believe that nowadays"...but you still have to pass the "temple recommend interview" before you may become endowed, so the "certification" has been passed on down to current times....mormons still have man's laws to obey to be "saved through Christ".
Interesting. OK, so what does this have to do with Romney as a candidate for POTUS or being the POTUS?