Sen. Michael Crapo, Idaho Republican, is shown in a booking photo after being arrested early Sunday morning, Dec. 23, 2012, and charged with driving under the influence in Alexandria, Va., a Washington suburb. (AP Photo/Alexandria Police Department)

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Sen. Michael Crapo, Idaho Republican, is shown in a booking photo after being arrested early Sunday morning, Dec. 23, 2012, and charged with driving under the influence in Alexandria, Va., a Washington suburb. (AP Photo/Alexandria Police Department)