Defense Secretary Pete Hegseth, Secretary of State Marco Rubio and Gen. Dan Caine, chairman of the Joint Chiefs of Staff, are scheduled to brief top lawmakers known as the “Gang of Eight” behind closed doors on Tuesday, three officials told ABC News. Separately, Sen. Roger Wicker, the Republican chairman of the Senate Armed Services Committee, told reporters that he expects to speak this week with Adm. Alvin Holsey, who unexpectedly announced this fall he was stepping down as head of U.S Southern Command after less than a year on the job. It was not immediately clear how Holsey would meet with the lawmakers, and if it would be in person or virtual. The Gang of Eight briefing by President Donald Trump’s national security team follows the completion of the administration’s national security

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