Simplify the following text for a Grade 10 native English-speaking person.
Original: As the United States Secretary of Commerce in the 1920s under Presidents Warren G. Harding and Calvin Coolidge , he promoted partnerships between government and business under the rubric `` economic modernization '' .
Simplified: As a United States Commerce Secretary in the 1920s under Presidents Warren G. Harding and Calvin Coolidge , he promoted economic modernization .