And I think what Pelosi said just corners the GOP in. That when the evidence is presented she wouldn't push for impeachment unless the evidence was very "graphic" (I think that's the word she used, maybe it was Schiff that said graphic).
Anyway, I think we need to wait until it's presented. Remember, Nancy was in the gang of 8 that has seen some or all of the info. And she is a forward thinking lady. What she has done is make a public statement saying that she's not chasing impeachment as a political move. That she doesn't support impeachment unless the evidence leads them there. She has not said that she's absolutely won't do it, she's just said the evidence needs to be conclusive and the move needs to be bipartisan. She's played her cards such that the GOP will now have to explain why they are against impeaching a man that there is obvious evidence of criminal actions.