Mrs. Dobson (National Day of Pray) would not permit the Mormons to pray. Now that’s pretty darn pitiful.
One time my husband was in a prayer circle at the California Republican Assembly and when it was his turn to pray, they passed him over.
How sad.
(1) Well, if they were as one group praying directly to Jesus, then perhaps out of sensitivity for your husband, they didn't want to make him feel uncomfortable. [LDS doctrine being that LDS leaders say Mormons should only pray to Heavenly Father in Jesus' name, not directly to Jesus himself]
(2) Ensign Magazine, the LDS mag, has already said that LDS worship another God than do Christians. So, that being the case, what's wrong with Christians saying the same thing? (That they pray to another Jesus?) 2 Cor. 11:4 says there is "another Jesus"
(3) Finally, let me ask you, would you draw the line at letting anybody lead your group in prayer? Would you let a Scientologist, or a Moonie lead your group in prayer? Bottom line is, if you set boundaries yourself for who you would let lead your family, your small group, etc. in prayer, then why do you balk when you see others do it?