Theological differences between the two yield different understandings of the path to economic advancement..Like President Obama, Mr. Cain belongs to a mostly black congregation with a black pastor. But that is where the similarities end. Stark differences between the political philosophies of these two men may be rooted in their profoundly different theological heritages. The churches both men are (or in the case of Mr. Obama, were) longtime members of are known for liberal activism, but with notable differences in their views of scripture. Mr. Cain's church, Antioch Baptist Church North in Atlanta, Ga., is theologically conservative, affirming the inerrancy...