There was a controversy in the Evangelical Covenant Church last year, when two pastors each performed a marriage for a gay couple. One was a retired pastor who performed the service for his son; the second was the chaplain at North Park University in Chicago, the denominational college, much beloved (I hear) and a frequent speaker at retreats and conferences. There was a disciplinary action and she was relieved of duties for a year. She is now back and has put out a statement.
Update: The denomination's response is here.