If Gingrich had the stones to play hardball, he'd let Wm Clinton know the entire library of accusations might accidentally slip out if Pelosi follows through.
Make the impeached former president go to bat for noot.
People who understand hardball realize that Clinton and more than a few other democrats still in play have already had that thought about their own dirty laundry, and found many and various ways to tell Pelosi to STFU for crissakes.
Buffoons take Newt lightly. Veterans of the beltway wars, not so much.