But that was partly because everyone knew he couldn't serve as president after 2000, so expressing approval of him was "safe" (and a way of showing disapproval of the impeachment effort). If he were actually running for president again, I doubt the numbers would be anything like that.
More important, Clinton would probably have pledged in 1992 not to seek more than two terms, as Reagan would have in 1980, JFK and Nixon in 1960, and Ike and Stevenson in 1952. The fact is that even if the Amendment had fallen short, the *idea* that no president should ordinarily serve more than two terms (at least consecutive ones) was widespread--even Democrats merely said there should be leeway for emergencies like World War II. (Note Truman's refusal to run in 1952 even though the Amendment specifically allowed him to.) And note that there was no war or national emergency that would justify a third term in 1988 or 2000.