I also read an article this morning which stated that many political historians believe that if it were not for the hostage crisis, which a very liberal Walter Cronkite mentioned EVERY SINGLE NIGHT as he signed off the nightly news, Carter would have won a second term. Even the last polls taken in late Oct of 1980 showed him several points ahead of Reagan.
Slick Willie was re-elected shortly after the BJ incident.
So yes, there is truth in that statement.
His "kiss it" demand to Paula Jones may have been public earlier (it appeared in a magazine article but I don't remember the date) but it was dismissed as unverified slander.
He was President for 1461 days--probably there were hundreds of "BJ incidents" but none of them were publicized until Matt Drudge tore the lid off the media coverup of the Lewinsky case.