"There is a massive scandal that has been roiling the entire public health infrastructure of this country because the guy in charge of it is a dangerous crank with a pathetic record," says Chris Hayes on RFK Jr’s Senate hearing. Sen. Maria Cantwell joins to discuss. Our next MSNBC Live event is on October 11th in New York City! Buy Tickets Now: msnbc.com/live25 For more context and news coverage of the most important stories of our day click here: https://www.msnbc.com/ » Subscribe to MSNBC: