Charles Kupperman wanted a judge to rule on whether he was required to comply with a House subpoena to testify in the impeachment..
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Charles Kupperman media coverage
In response to opposition from House Democrats, Charles Kupperman's lawyers and a judge. Mulvaney will be filing his own lawsuit.
A former Trump White House adviser wants to block Mick Mulvaney from joining a lawsuit. The suit seeks to clarify whether the House..