I don't know any of those "Voodoo Republicans" you mention, though it is certainly true that in heavily blue-dominated states, the only way Republicans ever get elected is by appearing more purple than red, so to speak.
Again, I think the issue being addressed here is more the appearance of "whiteness" at the convention than any dispute over Conservative principles.
It is my term for the type of old guard Rockefeller Republicans. An homage to George Herbert Walker Bush and his sneering insult to Reagan’s economic policies.
http://www.investopedia.com/terms/v/voodooeconomics.asp#axzz25EaSYULl
Here Voodoo Republicanism of the past:
http://www.youtube.com/watch?v=CP9_kkzfN-w
Here it is today:
http://www.youtube.com/watch?v=XMSY9gZT-6I