Simplify the following text for a Grade 9 native English-speaking person.
Original: Fallin did not seek re-election in 2006 as lieutenant governor , but ran for the 5th Congressional District seat being vacated by Ernest Istook , who ran for governor .
Simplified: Fallin did not seek re-election in 2006 as lieutenant governor . She ran for the 5th Congressional District seat being vacated by Ernest Istook .