First, BJU has had a strong influence on the Republican Right in South Carolina. Second, he is quite correct in pointing out that BJIII has given cover for any of the more mainstream members of the evangelical right who would go for Romney.
But any "mainstream member of the evangelical right" who needs BJIII's cover to vote for someone whose religious denomination is labelled a cult on BJU's website, and whose pro-homosexual pro-abortion left-leaning agenda in Massachusetts is a matter of public record, is more of a deaf, dumb and blind lemming than an evangelical.