As an agnostic, I realize that the Christian community is going to argue that the Founders had insisted on opening meetings with prayer. I have yet to find a recorded prayer by any of them that mentioned Jesus in it. Most of them invoked "God" or "Providence." I can't say that there aren't any invoking Jesus, I just haven't found one. But I have no problem with City Councils, State Legislatures, or the Congress opening with prayer.
I DO have a problem with those prayers being restricted to Christians only. Those officials in attendance represent Jews, Muslims, Buddhists, Native Americans, and everyone else. These people pay taxes and have every right to have their religion represented as well. Or stop the prayers altogether.