In practice I think problems from this are slim to none.I agree; my comments were more theoretical.
It's really no different than any Christian promising to follow Jesus Christ. The Biblical doctrine then becomes the issue, how willing is the candidate to follow it. The same wiould hold true for an LDS candidate, how willing are they to adhere to the doctrines and policies of that specific Church. For example, does he agree with CA's Prop 8? The same exact question could be asked of candidates form a variety of churches.
I've always felt that these severe loyalty oaths have the potential to come into conflict with Romney's oath as U.S. President, which oath is as follows: "I do solemnly swear that I will faithfully execute the Office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States."
in my opinion, a conflict could arise if the LDS Church institution (or leader thereof, such as the Church president) either espouses an unconstitutional position, or directs President Romney to act in a certain way, or otherwise influences a decision President Romney makes. I know, I know, this is an extremely unlikely scenario (particularly in today's PR-driven LDS Church), but it is possible and there is precedent (i.e., the Church's defying anti-polygamy laws, which had been upheld by the Supreme Court as constitutional). Therefore, are not Romney's temple loyalty oaths relevant in connection with his campaign to become U.S. president?
Not in the least. It goes simply to the tenets of the religion. A Muslim candidate might be asked if he will try to institute Sharia Law or if he agrees with Sharia Law. And that is exactly how I would deflect the question. However it remains true, as it always has, the the LDS Church leadership does not and cannot pull those kinds of strings.