Who holds the most power and what did the presidents do during this period

You'll have to give us more to go on that a vague statement like that, or are you expecting us to do your entire homework assignment for you ?

Please refer to THIS ANNOUNCEMENT (https://www.askmehelpdesk.com/history-education/announcement-u-b-read-first-expectations-homework-help-board-b-u.html)

Soon as I build my time machine I will gladly let you know -- till then please read this -- https://www.askmehelpdesk.com/math-sciences/announcements.html -- Savage

LOL Savage I edited the title from 29th ;)