She asks him if he considers himself greater than LBJ the president who passed the Civil Rights Act. She asks how. He runs over it and ignores the questions.

Yah. Trump repeatedly gish gallops over any moderator. The solution, which she did perfectly, is call him out on his lie and bullshit and move on. You can’t debate someone who loves wallowing in mud. But you can make that mud incredibly uncomfortable. Which she did a great job at.