I don't think his religious views would make the slightest bit of difference - although he makes noises to accommodate evangelical and other Christian views. ...
To the degree he keeps them private, I would agree. When an individual's religious views serve to justify policies of public support for religious institutions, either directly or as is more common in political circles indirectly (i.e. government support for
faith-based initiatives), then the degree of his involvement with any religious institution may be a justifiable reason for disquiet and reservation about the person's qualification for public office.
Accordingly public suspicion is right to focus on insular churches and their adherents who may support active government interference or regulation with regard to issues of individual rights, personal privacy, or retention of special privileges for commercial institutions operated by religious organizations on the basis of promoting 'public morality' or 'traditional values'.
IMHO, any politician who feels he owes obedience or deference to a church, temple, mosque, bishops, priesthood, rabbinate, mullah, guru, lama, kahuna, or medicine man, on matters of public policy is a person who is wholly unsuited for an high public office.
Mark A. Baker