It is common, almost expected, for candidates for office in the United States to affirm their religious identity and to employ broad religious themes in support of their political agendas. It is the rare candidate, especially for the Senate or the presidency, who completely eschews religious language due to the pressure and scrutiny of church leaders and advocacy groups with religous and moral agendas.
Stiltner, Brian and Steven Michels. "Religion, Rhetoric, and Running for Office: Public Reason on the US Campaign Trail." Religious Voices in Public Places. Eds. Nigel Biggar and Linda Hogan. New York: Oxford University Press, 2009.