What is the main difference between a presidential and parliamentary democracy? in a presidential democracy, the president is elected by representatives from each region while in a parliamentary everyone votes b in a presidential democracy, the president inherits his or her power while in a parliamentary, people elect representatives that then chose the leader of the country c in a parliamentary democracy, citizens elect representatives that chose the leader of the country but in a presidential democracy, the people elect the president and the local leaders d in a parliamentary democracy, citizens elect both the representatives to parliament and the president but in a presidental, they only elect the president