President Trump has chosen John R. Bolton to be his new national security adviser. In 2005, a Republican-controlled Senate committee refused to confirm Mr. Bolton as President George W. Bush’s ambassador to the United Nations. We look back at those confirmation hearings, which portrayed Mr. Bolton as a threat to national security. Guest: Elizabeth Williamson, who writes about Washington in the Trump era for The New York Times. For more information on today’s episode, visit nytimes.com/thedaily.

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