A fair bit of relevance for those who are trying to make electoral predictions based on polls.
If one is trying to make predictions as to how he might govern, you are right. That said, while
Trump is no Reagan, Obama is no Carter, W is no Nixon, Clinton no LBJ, and Bush Sr. no Eisenhower. With the exception of Reagan, and perhaps Nixon, the presidents from the respective parties have been getting steadily worse. If Trump can improve on this by at least being better than the Bushes, let him drive the car.
TOO MANY VARIABLES
Reagan was decades ago.
o Polls via telephone, no internet vs few land lines, internet
o No computers vs highly rigged computer voting
eg South America has massive computer rigged voting