I think those things were chosen precisely because they are guaranteed by the same document (and in the case of newspapers, the very same amendment) as was under discussion.
Edit: I often forget that most people don't know the context to this. TLDR, there is no "right to vote" in the constitution. There are amendments that prohibit discrimination in the practice of voting, but if a state wanted to abolish elections for all people, they would not be infringing anyone's constitutional right to vote because no such right exists, as no such right is enumerated. Of course, not all rights are enumerated, but typically unenumerated rights are subject to lesser judicial scrutiny. Of course, this is not generally the case with voting and (lately at least) gay marriage, but altogether, this is a much longer discussion that is somewhat tangential to the argument at hand.