In a nutshell: The more you pick on a person for human failings with which all can identify, the more likely you will create sympathy rather than antipathy, especially if that individual has been forthright in his confession and penitent for his transgression, as Gingrich has been. He was ahead of the curveball this time, with nothing left to tell or for his aggrieved former wife to expose. Thus, her interview and the King question had the feel not of revelation but of a political hit aided and abetted by a salacious press.
Even Bill Clinton, who was less forthcoming and therefore, at least initially, less sympathetic, came to be viewed as a victim following months of investigation and the airing of sordid details only voyeurs could enjoy. Starr, as King, was merely doing his job, yet he became less likable than Clinton among Regular Joes watching television in their kitchens. However nobly Republicans may have considered their mission, everyday Americans — particularly men — saw persecution.
A Catholic friend captures the operative sentiment in terms Gingrich surely would appreciate. When she sees someone succumb to temptation or betray some other human frailty, she says: “I have those weeds in my garden.”