Bob Dole

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Former Kansas Sen. Bob Dole speaks during a campaign stop for Republican Sen. Pat Roberts at a mall Monday, Sept. 22, 2014, in Dodge City, Kan. (AP Photo/Charlie Riedel) ** FILE **

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Former Sen. Bob Dole greeted veteran Philip Grayson of Miami at the National World War II Memorial. Mr. Dole is there nearly every Saturday. (Dave Boyer/The Washington Times)

Former U.S. Senator and presidential candidate Barry Goldwater, left, meets with Senator and Republican presidential hopeful Bob Dole at Goldwater's Phoenix, Ariz., home Sunday afternoon, Feb. 25, 1996. Goldwater expressed his support for Dole's presidential candidacy. (AP Photo/Stephan Savoia)

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Former Sen. Bob Dole, R-Kan., waves to a crowd gathered at Johnson County Republican Headquarters in Overland Park, Kan., Monday, April 21, 2014. (AP Photo/Orlin Wagner)

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Former Sen. Bob Dole, R-Kan., talks to a crowd gathered at Johnson County Republican Headquarters in Overland Park, Kan., Monday, April 21, 2014. (AP Photo/Orlin Wagner)

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** FILE ** Former Sen. Bob Dole, R-Kan., center, takes questions while seated between Gov. Sam Brownback, left, and Rep. Kevin Yoder, R-Kan., right, during a visit to the Johnson County Republican Headquarters in Overland Park, Kan., Monday, April 21, 2014. (AP Photo/Orlin Wagner)

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Former Sen. Bob Dole, R-Kan., talks to a crowd gathered at Johnson County Republican Headquarters in Overland Park, Kan., Monday, April 21, 2014. (AP Photo/Orlin Wagner)

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Former Sen. Bob Dole, R-Kan., second from left, greets former Mission Mayor Laura McConwell, right, at Johnson County Republican Headquarters in Overland Park, Kan., Monday, April 21, 2014. (AP Photo/Orlin Wagner)