Southern political personalities like sweet corn travel badly. They lose flavor with every hundred yards away from the patch. By the time they reach New York they are like Golden Bantam that has been trucked up from Texas - stale and unprofitable. The consumer forgets that the corn tastes different where it grows.
Over the years the political establishment has frowned if a mainstream politician mentions marriage.
For the record I believe elected officials should talk about faith. Our founders believed the moral principles of faith were indispensable to our nation's survival. The Declaration of Independence mentions God four times.