Day 182: Trump inaugural chair Barrack charged with being a foreign agent
Trump's 2017 inaugural chairman, Tom Barrack, has been arrested and charged with being a foreign agent for the United Arab Emirates. Plus a new study that finds the Johnson & Johnson vaccine is not as effective at protecting against the Delta variant. Brian Williams discusses that and more with Ashley Parker, Sam Stein, Barbara McQuade, Dr. Irwin Redlener, Cornell Belcher, and Matthew Dowd.