To many Americans, the right to vote in a presidential election is a sacred and precious opportunity. To others, the right to not vote is just as meaningful. And they exercise it.
In just-released data, the Pew Research Center reports that about 43 percent of Americans of voting age in 2008 didn’t participate in the presidential election.
If you no longer think that the US Government is legitimate under the Constitution then there is every reason not to vote. To vote would be to lend legitimacy to a system that you do not think is legitimate.