J. Mark Johnston, Date of Birth, Place of Birth
TweetJ. Mark Johnston
Date of Birth: 21-Sep-1962
Place of Birth: Sioux City, Iowa, United States
Profession: politician
Zodiac Sign: Virgo 
About J. Mark Johnston
- John Mark Johnston (born September 21, 1962) is an American former politician.
- He served in the South Dakota Senate from 2011 to 2013.
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