republican voters prefer donald trump over jeb bush. that's 25%. once again, donald trump trails ben carson head to head 49 to 43. forceful language from president obama on global warming. he opened the climate change summit in alaska with a message to leaders. >> if we abandoned our course of action, if we do nothing to keep glaciers from melting faster, storms from growing stronger, we condemn our children to a planet beyond their capacity to repair. >> he posted to facebook yesterday and will update throughout the trip, a behind the scenes look at what's he's doing. he's taking over the white house official instagram gram account.