White House chief of staff John Kelly and national security adviser John Bolton got into a heated, profanity-laced shouting match outside the Oval Office on Thursday, according to multiple reports.

CNN reported that the two men clashed over immigration policy in the wake of a government report that found a record number of migrant families illegally crossed the U.S. border in September.

Bloomberg reported that the incident led some White House aides to wonder whether one of the senior officials might immediately resign in anger.

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