Pelosi appears to be leading the process towards a rapid articles of impeachment focused on the Ukraine scandal. I am not sure that that is the best strategy. My fear is it will lead to the Senate refusing a trial, or conducting a similarly rapid trial of quitting Trump of any doing. The outcome of that would be Trump claiming exoneration and victory and treating the whole affair similarly to the way he treated the Mueller report. I think that would be a bad outcome.
Rather I think the house should pursue a protracted and extended investigation with maximum publicity, going over every instance of Trump lawbreaking including the Mueller report, the stormy Daniels scandal, the Trump foundation, etc. etc. etc., the Ukraine scandal. The effort should be to extend this process all the way up to the doorstep of the election with no sincere effort to bring this to the Senate. Then if Trump loses the election the impeachment trial will be moot, or if Trump wins but the Senate flips the trial proceed with an unfriendly senate. Or a wide range of other outcomes, all better than the rapid current process.