Clinton left office with 67% approval ratings, if he campaigns for Gore, Gore wins easily.
Wrong thread, and the President's approval ratings don't necessarily rub off on the VP. For instance, Nixon lost in 1960 despite Ike having around 60% approval ratings.
1960 is remarkably similar to 2000. Nixon and Gore didn't fully use their party's popular incumbent president (Nixon didn't because of Mamie Eisenhower's request, Gore didn't because of Clinton's scandal) which led to their narrow defeats. Nixon would have beaten Kennedy by 2-3 percent had Eisenhower been allowed to campaign extensively the entire season (Which would have exhausted him physically and mentally), and Gore would have won somewhat comfortably had he used Slick Willie.