The fact that Mormons are Christians is not in doubt.
The fact that you are a misinformed, close minded bigot is as well not in doubt.
Y'know, as recently as a few decades ago, many Mormons rather proudly denied he mantle of "Christian." There are a number of important doctrinal differences that many Christian sects feel that Christians are defined by a number of specific fundamental beliefs (including the Trinity). Mormons, on the other hand, use the definition of "Christian" as being a follower of Christ.
I think the Mormons' definition, as opposed to Evilmexicandictator's and the conservative Protestants', is more apt. But you're arguing over definition, not over substance. You can't reject Evilmexicandictator's definition of "Christian" simply because you do not like it, and then complain that he isn't respecting your faith (or Mitt Romney's, whatever the case may be). It's a double standard. If his definition is part of his faith, it should be off-limits based on what you say. Anything less is "bigoted," right?
Besides,
who cares if they are Christians or not? Seriously. Pedantry.