President Trump says the officials within his White House who provided information to a whistleblower are close to being "spies" and he's demanding that they be unmasked.
He suggested to a group of American diplomats in New York that in earlier times the whistle-blower and his sources might have faced the death penalty for treason.
Our Washington Correspondent Simon Marks reports.
IN: "For months….."
OUT: "…and his top aides"
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