In last night's Democratic Party debate, Buttigieg was the only candidate to mention separation of church and state.
He said "The Republican party likes to cloak itself in the language of religion. Now, our party doesn’t talk about that as much, largely for a very good reason, which was we are committed to the separation of church and state, and we stand for people of any religion and people with no religion."
See the video at https://m.facebook.com/watch/?v=2156315214659648&_rdr.