Our official state religion
Let's float this idea past the wanna-be theocrats: if the US is to endorse a state religion, it ought to be Unitarianism. At least Thomas Jefferson thought so:
I rejoice that in this blessed country of free inquiry and belief, which has surrendered its creed and conscience to neither Kings nor priests, the genuine doctrine of one only God is reviving, and I trust that there is not a young man now living in the United States who will not die a Unitarian.
I guarantee you that if this position were taken seriously, all the fundamentalists and evangelicals and batshit-insane televangelists would be back-pedaling so fast and insisting so vocally that we need to keep the government secular that they'd all suffer horrible cases of whiplash.
I rather like the idea. Even though I have no interest in joining a Unitarian church, I can respect a belief system that tolerates and encourages freethought.


People are still confusing the Unitarianism of Jefferson's time with modern Unitarian Universalism. In Jefferson's day, Unitarians were theists who believed that Jesus was a moral authority with divine nature.
The modern UU having "no dogma" is in many ways an outgrowth of Universalism, the Christian doctrine that all will eventually be saved; that no-one will ultimately be consigned to hell. Working from that axiom, a focus on thinking the right things in order to escape punishment becomes moot, and has wound up being set aside in UU teaching.
Wikipedia has fairly good entries on Unitarianism, Universalism, and Unitarian Universalism.