WASHINGTON (Reuters) -U.S. Director of National Intelligence Tulsi Gabbard rescheduled a briefing on Wednesday for the U.S. Senate intelligence committee because of the situation in Iran, a spokesperson for the panel's Republican chairman, Senator Tom Cotton, said. "Given her principal-level engagements and ongoing developments in the Middle East, we are looking to find a mutually agreeable day in the near future," the spokesperson said. The postponement was first reported by Axios. (Reporting by Patricia Zengerle; Editing by Chris Reese)