Seems a worthwhile question. Below is part of his wikipedia bio. Not especially helpful.
Raised a Democrat, his religious beliefs led him to embrace conservatism. While in Boston, he appeared on several radio shows on WHDH, and hosted a nationally syndicated talk show, "Earl Jackson Across America."
In 1996, he joined with the Christian Coalition to head "The Samaritan Project," an outreach program that distributed $500,000 to churches that were victims of arson. He served as a minister with the chapel of the Boston Red Sox for five years, and also served as the protestant chaplain for the Boston Fire Department.
In June 1998, he was consecrated a bishop. Later that year, he and his family moved to Chesapeake, Virginia, and founded Exodus Faith Ministries.
The title Bishop means different things in different denominations. I just wondered — that’s all.
We know he’s not a Catholic Bishop, since the Catholic clergy has been forbidden to run for public office since some Dem abuses in the 60s.
And Romney was a Bishop in the LDS church, althouh he no longer used the title, nor held the office.