captioning funded by cbs >>> good morning. it is friday, august 5th, 2016. welcome to "cbs this morning.? a new national poll shows donald trump trailing hillary clinton by the largest gap since the conventions. clinton's running mate tim kaine tells us why he thinks trump is confused. >> president obama gives his first response to the questions about the 400 million dollar cash payment to iran. he says talks about ransom blongs in a spy novel. >> do tonight's olympic ceremon and will describe gisele bundchen as racist we begin this morning with a look at today's "eye opener." where to start on answering this