Who adheres to dual-covenant theology?

Another question has asked about the Biblical basis for dual-covenant theology , but I'm interested in *who* holds it. Wikipedia indicates that some "liberal" Christians do, but I'm looking for more specifics. It also appears that "dual-covenant theology" is used pejoratively, rather than being a self-appellation. 1. Who are some prominent clergy associated with DCT? From what denominations do they hail and how common is it in those denominations? 2. What term(s) do they use to describe their theological framework other than DCT? Are there major sub-groupings within DCT?