House Judiciary Committee Chairman Jerrold Nadler says President Donald Trump’s assertion of executive privilege over special counsel Robert Mueller’s report is a clear escalation of his administration’s “blanket defiance” of Congress.

Nadler made the comments ahead of a committee vote to hold Attorney General William Barr in contempt of Congress. The committee is moving to hold Barr in contempt after the Justice Department rejected House Democrats’ demands for a fuller version of Mueller’s report and other documents.