Monday on the News Hour, Congress formally certifies Donald Trump's election victory under the long shadow of the Capitol riot four years ago. Canadian Prime Minister Trudeau announces he's resigning amid mounting public disapproval. Plus, a veteran's decision to take his own life and detonate a Cybertruck in Las Vegas refocuses attention on mental health care for members of the armed services. PBS News is supported by - https://www.pbs.org/newshour/about/funders