What power do you think the average citizen of the United States has to affect its government? A phone call to their senator (most likely ignored, best case yo

What power do you think the average citizen of the United States has to affect its government? A phone call to their senator (most likely ignored, best case you end up a tally in the nay yay spreadsheet, and either way it doesn't matter because they are going to vote the party line) and a vote on Election Day (hah!).