Senator Richard Blumenthal, a Democrat from Connecticut, is calling for a "prompt, penetrating investigation" into the causes of the nationwide ground stop, NPR reports.
He released the statement late on Friday 13 November. He is the third Democratic senator to call for scrutiny of the FAA, after Tammy Duckworth and Maria Cantwell pledged to seek answers from the agency.
Blumenthal's statement is a call for an investigation. It does not announce one.
NPR also reports that FAA leaders did not brief the media at the White House press conference. They gave no further detail on the communication outages.