Former solicitor general Paul Clement has resigned from his law firm, Kind & Spalding, over the firm’s decision to back out of a commitment to defend the Defense of Marriage Act against a constitutional challenge.

In a letter to King & Spalding chairman Robert Hays, Clement says he chose to resign not because he has strong personal views about DOMA. Rather, he writes, “I resign out of the firmly-held belief that a representation should not be abandoned because the client’s legal position is extremely unpopular in certain quarters.”