Mahatma Ghandi: Killed by a muslim seperatist.
I believe he was shot by a Hindu extremist, who was opposed to Gandhi treating Muslims fairly.
Also, if this is a “list of political figures who have been shot” not just killed, shot in any circumstances (not just assassinations) and since today is Memorial Day, you can add the following (long but not complete):
Sen. Bob Dole (WWII Army, took three or four 8mm machine rounds.)
Sen. Daniel Inouye (WWII Army, lost an arm in WWII (from artillery fire? Does this count as being shot?))
Sen. Sam Ervin (WWI Army, resign (or loses) his officer’s commission due to poor performance, as an enlisted man goes on to earn the Distinguished Service Cross, the Silver Star and two Purple Hearts.)
Rep. Wayne Gilchrest (Vietnam Marines)
Sen. Chuck Hagel (Vietnam Army)
Sen. Howell Heflin (WWII Marine)
Gov. Thomas J. Herbert (WWI Army)
Rep. Sam Johnson (Vietnam Air Force, POW)
Gov. Joseph Kernan (Vietnam Navy)
Sen. John Kerry (Vietnam Navy)
Rep. William M. Ketchum (WWII & Korea Army)
Rep. Jim Marshall (Vietnam Army)
Sen. Spark Matsunaga (WWII Army)
Sen. John McCain (Vietnam Navy)
Rep. Pete McCloskey (WWII Navy & Korea Marine)
Gov. Evan Mecham (WWII Army)
Rep. Robert H. Michel (WWII Army)
Gov. William G. Milliken (WWII Army Air Corps)
Rep. Parren J. Mitchell (WWII Army)
Gov. Arch A. Moore, Jr. (WWII Army)
Rep. Jack Murtha (Korea & Vietnam Marines)
Rep. William F. Nichols (WWII Army)
Rep. Steven B. Derounian (WWII Army)
Sen. Daniel Brewster (WWII Marine)
Rep. Duke Cunningham (Vietnam Navy)
(Not all of the above lived up the high standards of their service when holding elected office.)
Sources:
http://politicalgraveyard.com/group/purple-heart.html
http://www.nndb.com/honors/279/000043150/