Attribute whatever dishonorable motivation you want to Brownback. He is asking questions that a lot of us in the base want answered ASAP.
"A lot of us in the base" don't get to vote on her confirmation. The Senate is the sole body with that responsibility. This is a power struggle, and it shouldn't be happening. The constitution does not require the president to ask the senator's permission to make an appointment. Senator Brownback and his accomplices are putting everything at risk to assuage their own egos. Their questions could have been asked in private, where the answer would not guarantee a filibuster. I once had a much higher opinion of senator Brownback.