Sen. Lindsey Graham (R., S.C.) called on Sunday for Republican unity in his effort to block the nomination of Janet Yellen to be the next Federal Reserve chairman.

In explaining his strategy on “Fox News Sunday,” Mr. Graham said it had virtually nothing to do with Ms. Yellen or the Fed and everything to do with forcing the White House to allow lawmakers to speak with survivors of the 2012 attacks on U.S. diplomats in Benghazi, Libya.