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FILE - In this Jan. 20, 2017 file photo, White House Staff Secretary Rob Porter, center, hands President Donald Trump a confirmation order for James Mattis as defense secretary, in the Oval Office of the White House in Washington, as White House Chief of Staff Reince Priebus, right, watches.  Porter is stepping down following allegations of domestic abuse by his two ex-wives.   (AP Photo/Evan Vucci)
FILE - In this Jan. 20, 2017 file photo, White House Staff Secretary Rob Porter, center, hands President Donald Trump a confirmation order for James Mattis as defense secretary, in the Oval Office of the White House in Washington, as White House Chief of Staff Reince Priebus, right, watches.  Porter is stepping down following allegations of domestic abuse by his two ex-wives.   (AP Photo/Evan Vucci)

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Morning news briefing from CNN

Morning news briefing from CNN on Thursday, February 8.

Morning news briefing from CNN

Morning news briefing from CNN on Thursday, February 8.