"What? Why are you asking me that question?" Trump said to one reporter following a rally. Trump then ignored a wave of follow-up questions.
"Where did you hear that?" he said to another reporter. "I don't know where you heard that."
When asked about the Yahoo interview, Trump said: "I never responded. I never responded to that question ... I never responded. I don't know who wrote it, but I never responded."
Another reporter asked Trump to explain the difference between a Muslim database in the United States and the registry of Jews that once existed in Nazi Germany.
"You tell me," Trump said. "You tell me. You tell me."