I sincerely hope that it would have plenty to do with the candidates position on:
Partial Birth Abortion
Marriage between a man and woman
Birth control distribution by the government ( especially in the schools)
Sex education in the government schools
Pushing homosexuality in the schools.
Vouchers and tax credits for private schools ( Catholic schools)
All First Amendment provisions.
The wrong stand on any of these issues should be a deal killer for any believing and practicing Christian ( Catholic or Protestant)!
Among other things.