A top Republican senator said Sunday he planned to hold up President Barack Obama's nominees for the Pentagon and Central Intelligence Agency, further complicating an already confrontational confirmation process.

Sen. Lindsey Graham (R., S.C.) said he would put a "hold" on the nominations—a procedural move that often halts deliberations—until the White House gives more information about last September's attack on U.S. facilities in Benghazi, Libya.

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