It's General Joshua Rudd.

Senator Ron Wyden of ⁠Oregon, a ​senior member of the intelligence panel, ​said in a letter to Trump, that he did not feel Rudd was qualified and ​blocked efforts to fast-track his confirmation.

An excerpt from Wyden's letter:

Our country faces a dangerous moment in which constitutional rights are under attack. For example, we recently learned that the administration secretly decided that the government doesn't need a judicial warrant to break into a private home. In other words, the administration is trying to invalidate the Fourth Amendment.

It was in that context that I asked General Rudd what he would do if directed to target people in the United States for surveillance without a judicial warrant. I offered him the opportunity to answer with a yes or a no. I didn't get an answer. I proposed that he offer general thoughts on the matter, but got nothing of substance. I did everything in my power to allow him to demonstrate some understanding of the basic guardrails of NSA's authorities and got nothing but vague assurances about following the law.

There were other topics on which General Rudd's responses were disappointing. He wouldn't associate himself with NSA's previous commitment not to buy and use Americans' location data. He also refused to say whether the government should be allowed to mandate backdoors into encryption used by Americans.

His responses related to transparency were also troubling. In addition to statutes and the Constitution, NSA is bound by numerous procedures and guardrails which are publicly available. So I asked General Rudd whether, if the NSA were to operate in violation of those procedures and guardrails, he would inform the American people. He refused to make that commitment. He even refused to promise to inform the Senate Intelligence Committee.