Pelosi, about as wily a political operative as there is — the same can be said of Senate Majority Leader Mitch McConnell — bided her time, resisting impatient young guns in her caucus who wanted to move much earlier, for two reasons: She knew that Trump, being Trump, would keep handing her more and more rope with which to hang him — and he didn’t disappoint.  …She also knew that public opinion wasn’t sufficient to warrant impeachment proceedings. 

Nancy Pelosi’s impeachment waiting game paid off for Democrats

hmmmm