It's a valid question, I think, given the way that Lawrence O'Donnell viciously and insultingly went after Mormonism last night on that network. Goodness knows that I have my problems with Senate Majority Leader Harry Reid. And I have no intention of converting to the LDS faith any time soon, or indeed at all. But to say "Mormonism was created by a guy in upstate New York in 1830 when he got caught having sex with the maid and explained to his wife that God told him to do it" in the pursuit of crude partisan purposes is an insult that splatters far beyond its designated target (in this case, Mitt Romney).
I understand that Harry Reid was a boxer, when younger. If the Senator takes this punch without hitting back, then those days are long gone for him, indeed.
PS: I see Instapundit had the same reaction.
PPS: Sorry, but there is a certain point beyond which you cannot and should not accept taking one for your political team. You would not ask a Jew to tamely accept that someone on national TV repeated the blood libel; a Catholic is not expected to remain silent at a network anchor's suggestion that the Pope is actually the Antichrist; and going on the air and telling a Muslim that - God, take your pick, but the point is that even members of that particularly prickly religion have a legitimate right to be offended when someone says something that's legitimately offensive. If Reid is a better Lefty than Mormon... well, we're about to see whether that's true.