1. Baton Rouge battered by historic rainfall, with Mark Alian Dery 2. Frac-sand mining threatens to expand in NE Iowa, with Dean Shultz, 16:04 3. Battle lines drawn in solar revolution, 32:13 4.Jennifer Merolla discusses Trump's evolving immigration proposals, 45:09 5.Des Moines "park and ride" nearly empty, 55:44