(My opinion, no one cared, nothing big was happening at the time, the biggest thing at the time in the world during the "rise of the mongol empire" was France outlawing dice games) But okay the reason why the Mongol Empire grew to its largest was that they unified all the tribes and had a specialty of riding horseback with archery. Their Horsemen were unparalled at this time.
The correct answer is that the consitution increased the power of the President by giving hi the option of veto but as a check and balancesa decreased on the power of the presidency by giving congress the option of impeachement if the president does anything wrong.
