Glenn Beck worked the crowd like a preacher at a rally this month in Louisville, Ky., declaring that God had responded to conservatives’ prayers by sending a slate of tea party candidates to wrest control of the Republican Party from Mitch McConnell. But there was a more earthly benefit to the arrangement that brought Beck to the rally. It was organized by the tea party nonprofit group FreedomWorks, which had endorsed the candidates — and which has paid more than $6 million in recent years to have Beck promote the group, its initiatives and events. ..............