Why have term limits or a set number of years at all

Explain how you think a president can have an impact on reform and progressivism. use examples of what roosevelt, taft, and wilson did. pls , i'm being timed. so much < 3

Name three things the framers of the constitution did to keep the federal government or any part of it from becoming too powerful.

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change