The most likely reason is to prevent the president from abusing its power.
Hope this helps:)
Answer: Because of widespread fear of a strong central government at the time they were written and strong loyalties among Americans to their own state as opposed to any national government during the American Revolution, the Articles of Confederation purposely kept the national government as weak as possible
Explanation:
Representatives maintain a positive relationship with constituents by:
I) staying in constant communication with the constituents i.e. use of letters, blogs, media appearances and websites
ii) Having their staff to carry out casework, or the staff helping to resolve problems which the constituents have encountered with the national government, and request for favours such as tours of government offices and setting up meetings.
iii) Voting for motions that would keep their constituents happy by serving the interests and concerns of the constituents.
Democracy dates back to have started to develop in the days of Ancient Greece in the city state of Athens.
Not sure if this is what you were looking for but I hope it helps.