White House Hardens Posture Toward Migrants; Is the Mayor Running?; Cannabis and Mass Incarceration; How Robert Caro Does It
President Donald Trump announces the nomination of Kirstjen Nielsen to be Secretary of Homeland Security, in the East Room of the White House, Thursday, Oct. 12, 2017, in Washington
( Evan Vucci / AP Images )
( Evan Vucci / AP Images )
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