FILE - This undated photo provided by the Kirk for Senate campaign shows then U.S. Rep. Mark Kirk, R-Ill., a candidate for the U.S. Senate, in a flight suit at Andrews Air Force Base in

 

              FILE - This undated photo provided by the Kirk for Senate campaign shows then U.S. Rep. Mark Kirk, R-Ill., a candidate for the U.S. Senate, in a flight suit at Andrews Air Force Base in
FILE - This undated photo provided by the Kirk for Senate campaign shows then U.S. Rep. Mark Kirk, R-Ill., a candidate for the U.S. Senate, in a flight suit at Andrews Air Force Base in Maryland as a member of the Navy Reserve. Nearly a year after a stroke left him barely able to move the left side of his body, U.S. Sen. Mark Kirk is expected to climb the 45 steps to the Senate’s front door this week _ a walk that’s significant not just for Illinois’ junior senator, but also for medical researchers and hundreds of thousands of stroke patients. (AP Photo/Kirk for Senate campaign, File)