How did franklin roosevelt's presidency change the u. s. government

He made presidency de center of American politics.

Explanation:

He's kwon as the first moderns President. During his period, Congress gain more power, and Presidency as well.

All this happen through his decisive decisions, owning his authority. His philosophy was 'President has the right to use any and all power'.

Also, during his mandate, he develop responsibility to the people. He also believed that government has the right to regulate big businesses, this decisions had people consent, because he wanted to raise the economy participating in the Big Industries of the Country.