During last week’s historic U.S. Supreme Court argument over subpoenas of President Donald Trump’s financial records, U.S. Supreme Court Justice Neil Gorsuch made an e-discovery comment that caught some court watchers’ attention.

On May 12, the justices heard arguments in Trump v. Mazars regarding three U.S. House of Representatives investigation committees’ subpoenas for Trump’s financial documents. Participating remotely via phone conference, Gorsuch asked House general counsel Douglas Letter if there’s a limiting principle to avoid misusing subpoena power.