Trump will be effective, but Trump can’t do much to get an ineffective judge off of the bench except call him out from the podium.
But he could form a judicial review committee headed by Newt Gingrich charged with the task of identifying judges that need to be removed, and building a case for Congress to impeach them.
That’s correct. Impeachment is the only way to force a federal judge off of the bench. They can be encouraged to resign, but only the impeachment process can remove them if they refuse.