If I could be in one of the three branches of government, I would chose the Legislative Branch and be a Senator. A Senator creates laws, approve or reject treaties, and debates over the creation or update of laws. There are 2 Senators in each state, so 100 in total. Senator are elected every 6 years. To be a Senator, you must be over 30 years old and have lived in the United States for 9 or more years.