Rob Porter Rob Porter

Former White House staff secretary Rob Porter (left), White House chief of staff John Kelly and White House senior adviser Jared Kushner cross the White House South Lawn in August. Kelly on Friday outlined new security clearance protocols after questions were raised about Porter's access. Alex Brandon/AP hide caption

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Alex Brandon/AP

White House press secretary Sarah Huckabee Sanders with then-staff secretary Rob Porter in August. In the wake of Porter's resignation, Sanders has reassured reporters that President Trump is sympathetic to victims of domestic abuse. Alex Brandon/AP hide caption

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Alex Brandon/AP

FBI Director Christopher Wray addressed the background investigation of former White House staff secretary Rob Porter during a Senate intelligence committee hearing on Tuesday. Saul Loeb/AFP/Getty Images hide caption

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Saul Loeb/AFP/Getty Images

Ousted White House staff secretary Rob Porter speaks to President Trump after remarks he made on violence in Charlottesville, Va., in August 2017 at Trump National Golf Club in Bedminister, N.J. Pablo Martinez Monsivais/AP hide caption

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Pablo Martinez Monsivais/AP

President Trump speaks with White House secretary Rob Porter (center) and Sen. Mike Lee, R-Utah, outside the White House in December. Porter resigned this week amid allegations of domestic violence against his ex-wives. Pool/Getty Images hide caption

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Pool/Getty Images