Nancy Pelosi says she is not interested in impeaching Donald Trump. Maybe she means that or maybe it's just political strategy…an area in which she has a fair amount of expertise.
You might decide to say that now because you're not going to do it until we hear from Robert Mueller and maybe some of the agencies and states that are investigating Trump. If their reports aren't devastating, you're probably not going to impeach even over what's already quite provable. And if further reports are devastating…well, you'll seem more reasonable and a tad less political if you then say, "Well, as you know, early in March, I went on record as not supporting impeachment but all these new revelations make it a necessity."
Or you might just think it would serve Democrats better to run against Trump in 2020 as opposed to certain scandal-free alternatives who might emerge were he to be removed from office. In any case, Pelosi sure won't lose any support she has now if she changes her position later.
Friends keep asking me if I think Trump oughta be impeached. I have two answers, one being that if he is, it shouldn't be now. It should wait until more comes out. I don't believe even his most vociferous supporters would bet there won't be more scandals or that none of the current ones will stick. I also think that those supporters would have been screaming for impeachment for some time now if a Democratic president had half the accusations that have engulfed Mr. Trump.