Assuming they all want in, which of the candidates -- Romney, Pawlenty, Cain, Bachmann, Paul, Roemer, Johnson, Santorum, Gingrich -- should be allowed to participate in debates at this point? The background: CNN is excluding Johnson (and Roemer, if he wants in; I don't know if he does) from its upcoming debate. In the previous debate, Roemer was excluded. For what it's worth, CNN is using objective criteria based entirely on polling.
Note that while I'm not asking whether CNN's criteria are correct or not, or for anyone to suggest something else, a true "let 'em all in" approach could open the door to literally dozens of unknown cranks who decide they're running for president, and so it really isn't a workable policy. But I'm not asking about that; I'm just asking which of the nine people listed should be invited to debates at this point.