Ron DeSantis gives the first speech of his presidential campaign in Iowa, taking aim at former President Trump. Our panel explains how that will play with the national audience. Plus, a new study shows the first 45 words a police officer says during a traffic stop of a black driver can predict how that encounter will end. One of the researchers, who discovered the warning signs of a police stop likely to escalate, joins CNN Tonight to discuss. And, the fifth grade Florida teacher being investigated for playing her class a Disney movie with a gay character in it, joins to tell Alisyn Camerota about the heated school board meeting where parents and students had a lot to say about the situation. To learn more about how CNN protects listener privacy, visit cnn.com/privacy Learn more about your ad choices. Visit megaphone.fm/adchoices