Simplify the following text for a Grade 10 native English-speaking person.
Original: In the 1997 General Election , Bercow was elected the MP for Buckingham and promoted to the shadow cabinet in 2001 , holding held posts in the shadow cabinets of Iain Duncan Smith and Michael Howard .
Simplified: At the 1997 General Election , Bercow was elected the Conservative MP for Buckinghamshire . He served in the shadow cabinets of Iain Duncan Smith and Michael Howard .