Ronald Reagan - President Reagan's approval ratings across the years

According to columnist Chuck Raasch, "Reagan transformed the American presidency in ways that only a few have been able to."[377] He redefined the political agenda of the times, advocating lower taxes, a conservative economic philosophy, and a stronger military.[378] His role in the Cold War further enhanced his image as a different kind of leader.[379][380] Reagan's "avuncular style, optimism, and plain-folks demeanor" also helped him turn "government-bashing into an art form."

Reference 1: Event, Approval (%) and Disapproval (%).

Reference 2: March 30, 1981, January 22, 1983, April 26, 1986, February 26, 1987 and December 27–29, 1988[381].

Source: http://en.wikipedia.org/wiki/Ronald_Reagan