The birther issue is an issue because Donald Trump is letting it be an issue. And despite his supporters' best efforts to argue that it's not an issue, Trump isn't cooperating. Donald Trump spent a lot of time raising doubts over President Obama's birth certificate in 2011 – but now he won't clarify what he really believes. KINGSTON: I mean, he can...(CROSSTALK)TUR: Let me tell you what Donald Trump supporters tell me on the campaign trail...(CROSSTALK)MATTHEWS: Let Katy report here. TUR: Let me tell you what Donald Trump supporters tell me on the campaign trail often.

Source: Washington Post September 10, 2016 15:45 UTC