Political responsibility

I hadn't thought about Dan Quayle for a while but then I just watched a Molly Ivins video where her opinion coincided with mine, he's stupid. And some dots started connecting... did G.H.W.Bush choose Quayle because he's stupid as a way to prepare the country to see his less than brilliant son(s) as qualified to be POTUS? I actually don't think he did but the consequences of his choice of Quayle for VP is evidenced by, thankfully, former president GWB and ominously by president-elect DJT.