“A key witness in the impeachment investigation filed a lawsuit Friday asking a federal judge to rule on whether he can testify, a move that raises new doubts about whether President Trump’s closest aides, like the former national security adviser, John Bolton, will be able to cooperate with the inquiry,” the New York Times reports.
“House Democrats had subpoenaed the witness, Charles Kupperman, who served as Mr. Trump’s deputy national security adviser, to testify on Monday. But in an effort to stop Mr. Kupperman from doing so, the White House said on Friday that the president had invoked ‘constitutional immunity,’ leaving Mr. Kupperman uncertain about what to do.”
“The implications of the suit, filed in federal court in Washington, extend beyond Mr. Kupperman. His lawyer, Charles Cooper, also represents Mr. Bolton and is likely to address congressional requests for his testimony in a similar fashion.”
