I partially see what Jerzeykydd is saying.  If an article is published saying that it is believed So-And-So "will not run in 2012," then we should not be able to use that article as one of the three sources necessary to support So-And-So as a potential 2012 candidate.  The article must say that So-And-So at least "might run" or "ought to run".  However, as long as there are three articles within the last six months that do advocate the possibility or desirability of So-And-So's running for President in 2012, we ought to keep So-And-So listed on the page, even if common sense dictates that they will not run (Dick Cheney, Mark Sanford, et. al.), simply for consistency's sake.