Cannot stand her. She can challenge the politicians to her heart's content. They ought to be challenged.
But towards the "ordinary" guests, there is just no need for her attitude.
I saw her interviewing a country and western band some time ago, and one of the males was using the term "ma'am" (like they do in his part of the world) when answering her questions.
TWICE she very snottily told him not to address her as ma'am. She was INCREDIBLY rude, I thought.
If I ever had the misfortune to meet her, I'd shoehorn ma'am into every sentence, just to annoy her.