It’s a legal term that basically means, in civil court (not criminal court): if you refuse to answer questions or provide documentation, we’ll assume the worst.
lexisnexis.com/uk/lexispsl/co…
oversight.house.gov/sites/democrat…
apnews.com/f8a06b08c19245…
politico.com/story/2019/04/…
usatoday.com/story/news/pol…
cnn.com/2019/09/27/pol…
politicususa.com/2019/09/27/the…
nbcnews.com/video/mueller-…
rollcall.com/news/congress/…
politico.com/story/2018/07/…
watergate.info/impeachment/ar…
law.cornell.edu/constitution-c…