https://truthout.org/articles/trumps-order-to-defy-subpoenas-is-itself-grounds-for-impeachment/
"The Constitution gives Congress the “sole Power of Impeachment.” Yet President Donald Trump has ordered all of his current and former senior advisers to defy congressional subpoenas to testify in the impeachment inquiry. Trump is claiming the subpoenaed witnesses have “absolute immunity” against civil or criminal liability for refusal to provide testimony. However, “absolute immunity” is a creation of the Department of Justice’s Office of Legal Counsel. No court, statute or constitution has ever recognized it."
