Glen Beck [also a Mormon] has been decrying this thinking in the past few days on his show, and this morning on one of the morning yawns.
I would not be afraid of a Jew as president, or for that matter even someone a little more right than center religiously. But I view Mormon religion as a cult. It promotes a lesser view of women, just like the WTS. I would assume that most presidents would be part of the mainstream religion that dominates the nation - Christianity. Just like most leaders in the ME are Muslim. That seems normal. But I would be worried if a leftist/rightist fanatic was at the reins here or there.
Ask yourself - If you were still a believer in the JW doctrine, and it became acceptable to run for president, how would your mindset affect your decisions? Soon you would be promoting a lack of higher education, bloodless medicine, no abortion, and attempting to convert everyone who came into the Oval Office. Doubt it would be too different for a hard-line Mormon. The comparison to Kennedy is inaccurate in my opinion for a lot of reasons too.
Jeff