Updated

The Navy admiral nominated to be the next head of the troubled National Security Agency is expressing concerns about the U.S. government turning over the bulk collection of telephone data to an independent third party, saying it could result in higher costs and delays identifying potential threats.

Vice Adm. Mike Rogers provided the first glimpse into his views of the nation's troubled surveillance programs in answers to a questionnaire submitted to the Senate Armed Services Committee. The document was obtained by The Associated Press.

The panel will conduct a hearing on his nomination Tuesday, giving lawmakers' their first and most crucial opportunity to judge the man who would oversee reforms to NSA's sweeping data collection programs.

Rogers says the U.S. must maintain the ability to review the phone data quickly.