It isn’t often in this business that you’re sitting at your desk and you get a phone call from a source that causes you to nearly fall off your chair. But that’s exactly what happened in my office at Newsweek’s Washington bureau early on the afternoon of Jan. 13, 1998. “There’s a little event going on at the Ritz-­Carlton in Pentagon City right now you might want to know about,” my (very plugged-in) tipster told me. Linda Tripp was having lunch with her good friend Monica Lewinsky—and Ken Starr had the whole thing wired. Starr?! Yes, my source said: I know it sounds crazy, but Starr (the independent counsel appointed to look into Bill Clinton’s Whitewater business dealings) was now investigating the president’s relationship with Lewinsky. The lunch was a sting aimed at getting the then-23-year-old former White House intern to flip and cooperate.

I was dumbfounded. I had been talking to Tripp for months—ever since I tracked her down one day at her desk at the Pentagon the previous March. I had heard all about Monica Lewinsky and what she had been telling Tripp about her fling with the president: the late-night phone calls, the surreptitious visits to the Oval Office, the telltale evidence on the blue dress hanging in her closet. It was a surreal story that seemed improbable at first, but more and more credible (and newsworthy) as Tripp offered up more tantalizing details. Clinton was arranging to get Lewinsky a job. He had given her gifts. And, once she got subpoenaed in the Paula Jones lawsuit, he fully expected her to keep her mouth shut, according to Tripp.

But while I had briefed Newsweek’s Washington bureau chief, the levelheaded Ann McDaniel, about all of this, neither she nor I were ever clear on how (or even whether) we were going to actually publish any of it. How would we ever prove that this affair actually happened? Or that the president had really told Lewinsky to lie? But the fact that Starr was on the case—that was unquestionably news. The story would turn Washington upside down—and, I immediately knew, would raise as many questions about prosecutorial overreach as it would about presidential recklessness and mendacity. And Newsweek was right in the middle of it. We alone knew what was going on.