Sen. Mark Kirk, R-Ill., speaking from the floor of the Senate on Monday. C-SPAN.org hide caption

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Sen. Mark Kirk, R-Ill., holding a cane. He was helped up the steps of the Capitol by Vice President Biden (behind Kirk) and Sen. Joe Manchin, D-W.Va., (in red tie). Sen. Richard Durbin, D-Ill., is at right. C-SPAN hide caption

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