So, with the passing of LDS Prophet Gordon B. Hinckley yesterday, this may cause some serious political problems for Mitt Romney's campaign.
Imagine a few scenarios:
#1 Mitt Romney chooses to attend the funeral. He takes away precious campaigning time before the Super Tuesday primaries. Also, people who wonder about the separation between the LDS Church and the Head of State might wonder why a man with no major position in the Church goes off to the funeral.
#2 Mitt Romney chooses to not attend the funeral. In doing so he eases the secular concerns about his ties to LDS leadership, yet at the same time, he might alienate a really big chunk of his loyal LDS support base.
#3 The Church, hoping to avoid the previous two worries, or to avoid doubling the media storm surrounding the funeral, chooses to not invite him to the funeral. This could be seen as a snub of Romney, even if that wasn't the intention. It could also be a good thing if he says that he'll do his mourning in private.
These are all interesting scenarios, and I imagine that somewhere someone in the Romney campaign has already planned out these contingencies before it actually happened. It doesn't matter, he won't get the nomination anyway.