Simplify the following text for a Grade 12 native English-speaking person.
Original: From 1988 to 1993 he served as Minister of the Interior and in May 1993 , the Bavarian Landtag ( parliament ) elected him as minister-president succeeding Max Streibl .
Simplified: From 1988 to 1993 he was the Bavarian Minister of the Interior and in May 1993 , the Bavarian Landtag ( parliament ) elected him as minister-president .