<span>The Anti-Federalists were composed of diverse elements, including those opposedto the Constitution because they thought that a stronger government threatened the sovereignty and prestige of the states, localities, or individuals; those that claimed a new centralized, disguised "monarchic" power that would only replace ...</span>
The main reason why the anti-federalists opposed the presidency was because they feared that a president would become tyrannical and act as a king, which of course proved to be a false worry.