To poke at this a little more... there definitely is a Christian Left. Probably one of the biggest differences, though, is that they don't have politics oozing out of them. The separation of church and state is something that is healthy for both church and state, after all. The Religious Right, on the other hand... exists in large part as a tactic by the very rich to enhance and retain their power. Much of it can be traced back to the "devout" white supremacists of the Confederacy and their white supremacist Christian God that emphasized economic prosperity, after all, and has been used as a convenient vector by a number of business interests' PR teams in the time since. More than a few of the preachers of the Religious Right literally were preaching Republican propaganda from the pulpit. There's plenty more that could be gone into but... the point is that the Christian Left really doesn't have anything remotely comparable, at last check. It's much more wholesome, after all.