But she declines to explicitly call him a racist. How does that make sense?

RAJU: “Is the president — is the president racist?”
WARREN: “Look at his remarks. He’s made racist remarks and he’s been racially hateful to people. That’s what matters.”
RAJU: “But is he racist?”
WARREN: “I — I don’t have to look at his heart, that’s not the point. He behaves. Look at what he’s done, it’s racist what he’s done over and over and over. It’s not the first time.”