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The Boston Globe

Nation

Political Notebook

White House warns on nomination delays

President Obama’s chief of staff said Sunday that the White House had ‘‘grave concern’’ that national security was at risk, given the Senate Republicans’ delaying tactics in confirming both a new Pentagon chief and a director of the Central Intelligence Agency.

The chief of staff, Denis McDonough, made the comment on ABC’s ‘‘This Week,’’ one of several Sunday shows where he made debut appearances as the top White House adviser.

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