Sean Spicer: I've let the president down

White House spokesman Sean Spicer on Wednesday said his gaffe about the Holocaust “let the President down” and was “reprehensible,” especially because “it’s a very holy week.” "Of all weeks, this compounds that kind of mistake," ​Spicer told host Greta Van Susteren during an interview at the Newseum in Washington, DC​. "It really is painful...