Tuesday on the NewsHour, top intelligence officials say the White House clearance system is broken, as questions swirl around disgraced aide Rob Porter. Also: The Senate kicks off immigration debate, Baltimore’s deteriorating school buildings, police officers convicted in a corruption…

Thursday on the NewsHour, the potential release of a controversial memo pits Republicans against national security. Also: Turkey clashes with U.S.-backed Kurds, the economics of fighting cancer, the #MeToo movement comes to the art world and a singer influenced by…

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