[daniel1212]

No, Mormonism is not Christian as they do not worship or follow the Jesus of the Bible. They follow a different Jesus.

But I fear, lest by any means, as the serpent beguiled Eve through his subtilty, so your minds should be corrupted from the simplicity that is in Christ. For if he that cometh preacheth another Jesus, whom we have not preached, or if ye receive another spirit, which ye have not received, or another gospel, which ye have not accepted, ye might well bear with him. (2 Corinthians 11:3-4)

Thus you can tell Mormon missionaries thatt hey are in the Bible:

For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ. (2 Corinthians 11:13)

[metmom]

2 Corinthians 11:13-15 For such men are false apostles, deceitful workmen, disguising themselves as apostles of Christ. And no wonder, for even Satan disguises himself as an angel of light. So it is no surprise if his servants, also, disguise themselves as servants of righteousness. Their end will correspond to their deeds.