Glass is half empty — it certainly makes you wonder if she and the Democrat party have something to hide.
And there is Trumps threat to release the redacted documents.
That seems the principle, perhaps sole leverage with regard to the issue of impeachment.
Clearly, a large portion of the Dems lust to commence impeachment proceedings with all manner of continuing "scandalous" allegations IMO as a means of knocking him out at the primary level. Such will also include favorable press coverage of his competition. Both efforts will require a sense of timing.
Pelosi's statement could be nothing but a head fake, of course; in any event, there is the question of whether she can control off-stage forces or even effectively control the House in this regard.