The Ramsay state by-election occurred because of the resignation of which former Premier of South Australia?
Ramsay state by-election, 2012:  The by-election was triggered by the resignation of former Premier and state Labor MHA Mike Rann. Mike Rann: Michael David "Mike" Rann , (born 5 January 1953) was the 44th Premier of South Australia from 2002 to 2011.
Michael David "Mike" Rann