Wyden again demands answers for feds' use of tear gas in Portland February 06 2021 Senator sends a new letter of inquiry to the Department of Homeland Security following use of tear gas at ICE facility. U.S. Sen. Ron Wyden is pressing the feds for answers as billows of tear gas still blow through parts of Portland — despite the change in administration at the White House. After never receiving a response to his August inquiry from then-Department of Homeland Security chief Chad Wolf, Oregon's senior senator sent a new list of questions to President Joe Biden's DHS secretary, Alejandro Mayorkas, expressing "serious concerns."