Via Religion Clause, with 2 presidential candidates belonging to the Church of Latter-Day Saints, Mormon leadership is being proactive in officially staying out of the electioneering business. In a letter sent on June 16, LDS President Thomas Monson reminded those in leadership positions that they are prohibited from endorsing candidates or participating in campaigning in their official capacities.
AP reports:
In a letter sent June 16, church president Thomas S. Monson and his senior counselors say lay leaders with full-time church responsibilities and their spouses should not participate in political campaigns. That includes making endorsements or financial contributions.
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Under the political neutrality policy, the institutional church does not endorse individual political candidates or parties. It also bans the use of church buildings or church-generated information for political purposes and asks candidates to refrain from making statements or inferences that suggest they have the church's support.
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The letter reminds the faith's lay leaders that when they do choose to engage in political activity they are acting "solely as individual citizens in the democratic process" and should not "imply, or otherwise allow others to infer, that their actions or support in any way represent the church."
You can read the church's policy on political involvement here, including excerpts from the June 16 letter.