Charles Kupperman
The White House directed Charles Kupperman, former deputy national security adviser, not to appear before the House committees.
An ex-White House adviser is supposed to testify in the House impeachment investigation, but the White House directed him against cooperating.
Questioning "mutual assured destruction," Charles Kupperman called nuclear conflict "in large part a physics problem."
Acting national security adviser Charles Kupperman was on the board of an anti-Muslim think tank that trafficked in conspiracy theories.
