This doesnt even make sense. Its not Trump's job to help them with their impeachment attempt. They say all the evidence points to his "crimes" yet they wont move forward with impeachment unless he gives them more access to witnesses and documents. You have to do evidence collection before a trial, any trial.
Yes, its very possible he gets wrapped up in the FISA abuse.
Is NK going to send a missle to Hawaii?
If you go by what they have been saying, they know he will be acquitted if they dont come up with stronger evidence so they are demanding he turns over some more evidence to help them impeach him.