Attacking anyone who points out what a political liability is it to have a Mormon nominee as a “bigot” is a foretaste of exactly what you predict.
Obama will hit Romney for the weird Mormon doctrines through his underlings. Everyone will know about these beliefs.
Hatch and other Mormons in high office or in the CIA or military are not elected on the national level.
Top Ten Bizarre Mormon beliefs: http://listverse.com/2008/02/04/top-10-bizarre-mormon-beliefs/
It will sink his chances and we can count on a second Obama term.
If worse comes to worse, as long as both the House and Senate are in conservative hands, it will create a “much weaker Obama”.