Report: Gosar's congressional staffer linked to neo-Nazi Nick Fuentes

Guests: Jamelle Bouie, Hunter Walker, Ruth Ben-Ghiat, Ryan Nobles, Sen. Ed Markey, Brandon Wolf, Mona Charen The president makes the case against white supremacy again—and the backlash roars. Tonight: new reporting on a potential new connection between white nationalists and the office of a sitting congressman. Then, what we know after two were hospitalized during a violent attack at the office of Congressman Gerry Connolly. Plus, the DeSantis campaign overhaul that includes shaking hands and looking at people in the eyes. And Senator Ed Markey on his renewed plan to fix a broken Supreme Court by adding four new justices.