10 people are killed and three are injured in a mass shooting in Buffalo, New York, that police say was fueled by the racist “White replacement” conspiracy theory. The shooting suspect has pleaded not guilty to first-degree murder. New York Governor Kathy Hochul joins to discuss what she calls as an act of ‘white supremacist domestic terrorism’, and her plea for a national response to fight gun violence. CNN Political Director David Chalian joins to give a rundown of the big races to watch in Tuesday’s primary elections, as MAGA conservative Kathy Barnette’s rise in Pennsylvania has the GOP reeling over potential upset and what it could mean for November. Plus, top Republicans speak out against the “Replacement” conspiracy theory as it creeps into mainstream GOP politics, a viral video shows a Rideshare driver standing up to racism, and hundreds of Ukrainians are evacuated from Mariupol. To learn more about how CNN protects listener privacy, visit cnn.com/privacy