My opinion? We need Bernie! How about you?
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In my opinion, the United States government is designed so that no one person has a significant amount of power or effect. Because of this, not even the president would be able to correct many of the problems, although they may have some impact. It is also important to consider the many implications of any action, which often leads to political stagnation. Unfortunately, I believe that neither Bernie Sanders nor any other presidential candidate will be able to make a significant impact, and will ultimately be blamed for everything that goes wrong during their term.