They can help because although they all do things a bit different from each other it all works out. As an example Roosevelt was a republican but he was also a progressive and so he leaned to a more democratic view but when he handed his job to Taft who was full on republican, even though he changed a few things he still developed.
<span>establishing a democratic government.</span>
I may be wrong, but I do believe this may have to do with Andrew Jackson's election, and the voting requirements changed because you no longer had to own property or be wealthy to vote. The common, free white man could vote.