I believe Mormonism is a cult, but it is impossible to know how much of Mormon theology Mitt actually believes. I have no reason to think Mitt will make any governmental decisions that favor Mormonism.
On the other hand, there is no doubt in my mind that Obama is a Muslim. No Christian has ever misspoken about his “Muslim faith”, nor made so many admiring statements about anything associated with Islam like Obama has.
Mitt may make choices that favor generic religious freedom, which would cover Mormons and many others in one swell foop.