Hi. The "six-month" expiration was created for the Republican Party presidential primaries, 2012 page. It's not that sources "expire" as you said, but on that primary page, candidates were was broken down into four categories - declared candidates, currently speculated candidates, formerly speculated candidates and declined. So, once a speculated candidate was no longer being speculated about, he or she wasn't deleted, they were simply moved to the "formerly speculated" section. Because Senate, Congressional and Gubernatorial elections pages make no distinction between "currently" and "formerly" speculated candidates, it doesn't apply. Not in this cycle, in the 2014 cycle, in the 2012 cycle or 2010 and so on. Thanks,