Here's Part I of the list:
#1 Terry Branstad (R-IA): 39th & 42nd Governor of IA from January 14th, 1983 to January 15th, 1999; January 14th, 2011 until his resignation on May 22nd, 2017.
https://en.wikipedia.org/wiki/Terry_Branstad
#2 William Janklow (R-SD): 27th & 30th Governor of SD from...